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ZSI_Reconnect_China/PATSTAT/CPCSchemeXML202302/cpc-scheme-F25J.xml

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<?xml version="1.0" encoding="UTF-8"?>
<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="F25J" definition-exists="true" date-revised="2018-08-01" status="published"><classification-symbol>F25J</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS </text><CPC-specific-text><text>OR LIQUEFIED GASEOUS</text></CPC-specific-text><text> MIXTURES BY PRESSURE AND COLD TREATMENT </text><CPC-specific-text><text>OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE </text><reference><text>cryogenic pumps <class-ref scheme="cpc">F04B37/08</class-ref>; gas storage vessels, gas holders <class-ref scheme="cpc">F17</class-ref>; filing vessels with, or discharging from vessels, compressed, liquefied or solidified gases <class-ref scheme="cpc">F17C</class-ref>; refrigeration machines, plants, or systems <class-ref scheme="cpc">F25B</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="F25J1/00" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/00</classification-symbol>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F25J1/00" definition-exists="true" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus for liquefying or solidifying gases or gaseous mixtures </text><CPC-specific-text><reference><text>recovering volatile solvents by condensation <class-ref scheme="cpc">B01D5/00</class-ref>; vapor recovery systems combined with filling nozzles <class-ref scheme="cpc">B67D7/54</class-ref>; solidification of carbonic acid <class-ref scheme="cpc">C01B32/55</class-ref>; for ammonia in general <class-ref scheme="cpc">C01C1/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J1/0002" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0002</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the fluid to be liquefied</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0005" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light or noble gases </text><reference><text><class-ref scheme="cpc">F25J1/0012</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0007" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helium</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/001" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrogen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0012" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Primary atmospheric gases, e.g. air</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0015" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0017" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/002" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Argon</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0022" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrocarbons, e.g. natural gas</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0025" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Boil-off gases &quot;BOG&quot; from storages</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0027" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J1/0027</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Oxides of carbon, e.g. CO<sub>2</sub></text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J1/003" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/003</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0032" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0032</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using the feed stream itself or separated fractions from it, i.e. &quot;internal refrigeration&quot;</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0035" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0035</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by gas expansion with extraction of work</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0037" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0037</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of a return stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/004" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by flash gas recovery </text><reference><text><class-ref scheme="cpc">F25J1/0267</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0042" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by liquid expansion with extraction of work</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0045" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by vaporising a liquid return stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0047" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0047</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using an &quot;external&quot; refrigerant stream in a closed vapor compression cycle </text><reference><text><class-ref scheme="cpc">F25J1/0221</class-ref>, <class-ref scheme="cpc">F25J1/0225</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/005" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by expansion of a gaseous refrigerant stream with extraction of work</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0052" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by vaporising a liquid refrigerant stream</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0055" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>originating from an incorporated cascade</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0057" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0057</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>after expansion of the liquid refrigerant stream with extraction of work</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J1/006" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/006</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the refrigerant fluid used </text><reference><text>refrigerants in vapor compression cycles <class-ref scheme="cpc">F25B9/002</class-ref>, refrigerant materials <u>per se</u> <class-ref scheme="cpc">C09K5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0062" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Light or noble gases, mixtures thereof </text><reference><text><class-ref scheme="cpc">F25J1/007</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0065" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helium</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0067" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrogen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/007" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Primary atmospheric gases, mixtures thereof</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0072" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0075" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0075</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0077" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Argon</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/008" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/008</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Hydrocarbons</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0082" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Methane</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0085" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Ethane; Ethylene</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0087" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Propane; Propylene</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/009" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hydrocarbons with four or more carbon atoms</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0092" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mixtures of hydrocarbons comprising possibly also minor amounts of nitrogen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0095" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Oxides of carbon, e.g. CO<sub>2</sub></text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0097" definition-exists="false" ipc-concordant="F25J1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0097</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Others, e.g. F-, Cl-, HF-, HClF-, HCl-hydrocarbons etc. or mixtures thereof</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J1/02" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/02</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>requiring the use of refrigeration, e.g. of helium or hydrogen </text><CPC-specific-text><text>Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0201" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0201</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using only internal refrigeration means, i.e. without external refrigeration</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0202" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a quasi-closed internal refrigeration loop </text><reference><text><class-ref scheme="cpc">F25J1/0208</class-ref>, <class-ref scheme="cpc">F25J1/0219</class-ref>, <class-ref scheme="cpc">F25J1/0224</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0203" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0203</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle </text><reference><text><class-ref scheme="cpc">F25J1/0211</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0204" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0204</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a single flow SCR cycle</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0205" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a dual level SCR refrigeration cascade</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0207" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0207</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as at least a three level SCR refrigeration cascade</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0208" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J1/0208</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>in combination with an internal quasi-closed refrigeration loop, e.g. with deep flash recycle loop </text><reference><text><class-ref scheme="cpc">F25J1/021</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0209" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as at least a three level refrigeration cascade</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/021" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a deep flash recycle loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0211" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0211</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0212" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a single flow MCR cycle</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0214" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a dual level refrigeration cascade with at least one MCR cycle</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0215" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with one SCR cycle</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0216" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0216</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a C3 pre-cooling cycle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0217" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0217</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as at least a three level refrigeration cascade with at least one MCR cycle</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0218" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J1/0218</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>with one or more SCR cycles, e.g. with a C3 pre-cooling cycle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0219" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with an internal quasi-closed refrigeration loop, e.g. using a deep flash recycle loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0221" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0221</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the cold stored in an external cryogenic component in an open refrigeration loop</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0222" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with an intermediate heat exchange fluid between the cryogenic component and the fluid to be liquefied </text><reference><text><class-ref scheme="cpc">F25J1/0224</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0223" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0223</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with the subsequent re-vaporisation of the originally liquefied gas at a second location to produce the external cryogenic component</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0224" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with an internal quasi-closed refrigeration loop </text><reference><text><class-ref scheme="cpc">F25J1/0208</class-ref>, <class-ref scheme="cpc">F25J1/0219</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0225" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using other external refrigeration means not provided before, e.g. heat driven absorption chillers</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0227" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>within a refrigeration cascade</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0228" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0228</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coupling of the liquefaction unit to other units or processes, so-called integrated processes </text><reference><text>combined plants, e.g. engine plant combined with an industrial process <class-ref scheme="cpc">F01K23/064</class-ref>; gas turbine plants in combination with other processes <class-ref scheme="cpc">F02C6/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0229" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0229</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/023" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the combustion as fuels, i.e. integration with the fuel gas system</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0231" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the working-up of the hydrocarbon feed, e.g. reinjection of heavier hydrocarbons into the liquefied gas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0232" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0232</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>integration within a pressure letdown station of a high pressure pipeline system</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0234" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0234</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration with a cryogenic air separation unit </text><reference><text>cryogenic separation of air <class-ref scheme="cpc">F25J3/04</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0235" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heat exchange integration</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0236" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing refrigeration for different processes treating not the same feed stream</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0237" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0237</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>integrating refrigeration provided for liquefaction and purification/treatment of the gas to be liquefied, e.g. heavy hydrocarbon removal from natural gas </text><reference><text>details related to rectification <class-ref scheme="cpc">F25J3/02</class-ref>; details related to partial condensation <class-ref scheme="cpc">F25J3/06</class-ref>; working-up natural gas <class-ref scheme="cpc">C10L3/10</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0238" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-10-01" status="published"><classification-symbol>F25J1/0238</classification-symbol><class-title date-revised="2015-10-01"><title-part><CPC-specific-text><text>Purification or treatment step is integrated within one refrigeration cycle only, i.e. the same or single refrigeration cycle provides feed gas cooling (if present) and overhead gas cooling</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0239" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0239</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Purification or treatment step being integrated between two refrigeration cycles of a refrigeration cascade, i.e. first cycle providing feed gas cooling and second cycle providing overhead gas cooling</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J1/0241" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0241</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the overhead cooling comprises providing reflux for a fractionation step</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0242" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waste heat recovery, e.g. from heat of compression</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J1/0243" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J1/0243</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0244" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation; Control and regulation; Instrumentation </text><reference><text><class-ref scheme="cpc">F25J1/0279</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0245" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Different modes, i.e. &apos;runs&apos;, of operation; Process control</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0247" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>start-up of the process</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0248" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stopping of the process, e.g. defrosting or deriming, maintenance; Back-up mode or systems</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0249" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0249</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling refrigerant inventory, i.e. composition or quantity </text><reference><text>charging or discharging refrigerants in cooling systems <class-ref scheme="cpc">F25B45/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J1/025" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0251" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0251</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermittent or alternating process, so-called batch process, e.g. &quot;peak-shaving&quot;</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0252" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control strategy, e.g. advanced process control or dynamic modeling</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0254" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling particular process parameter, e.g. pressure, temperature</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0255" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0255</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>controlling the composition of the feed or liquefied gas, e.g. to achieve a particular heating value of natural gas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0256" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Safety aspects of operation </text><reference><text><class-ref scheme="cpc">F25J1/0298</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0257" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Construction and layout of liquefaction equipments, e.g. valves, machines </text><reference><text><class-ref scheme="cpc">F25J1/0279</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0258" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>vertical layout of the equipments within in the cold box</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0259" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J1/0259</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout &quot;plot&quot;</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0261" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0261</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of cold box insulation, housing and internal structure </text><reference><text>buildings forming parts of cooling plants <class-ref scheme="cpc">E04H5/10</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0262" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of the cold heat exchange system </text><reference><text>constructional details <class-ref scheme="cpc">F25J5/00</class-ref>, construction of cold-exchangers in general <class-ref scheme="cpc">F28</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0263" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using different types of heat exchangers</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0264" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams </text><reference><text><class-ref scheme="cpc">F25J1/0272</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J1/0265" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J1/0267" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0267</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using flash gas as heat sink</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J1/0268" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a dedicated refrigeration means </text><reference><text><class-ref scheme="cpc">F25J1/0296</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0269" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0269</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement of liquefaction units or equipments fulfilling the same process step, e.g. multiple &quot;trains&quot; concept </text><reference><text><class-ref scheme="cpc">F25J1/0294</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/027" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-connecting multiple hot equipments upstream of the cold box</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0271" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0271</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Inter-connecting multiple cold equipments within or downstream of the cold box</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J1/0272" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple identical heat exchangers in parallel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0274" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0274</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Retrofitting or revamping of an existing liquefaction unit</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0275" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0275</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for special use of the liquefaction unit, e.g. portable or transportable devices</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0276" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Laboratory or other miniature devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0277" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0277</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Offshore use, e.g. during shipping</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J1/0278" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Unit being stationary, e.g. on floating barge or fixed platform</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J1/0279" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0279</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0281" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the type of prime driver, e.g. hot gas expander</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0282" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Steam turbine as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0283" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0283</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas turbine as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0284" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical motor as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0285" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of different types of drivers mechanically coupled to the same refrigerant compressor, possibly split on multiple compressor casings</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0287" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0287</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including an electrical motor</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0288" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using work extraction by mechanical coupling of compression and expansion of the refrigerant, so-called companders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0289" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Use of different types of prime drivers of at least two refrigerant compressors in a cascade refrigeration system</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/029" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanically coupling of different refrigerant compressors in a cascade refrigeration system to a common driver</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0291" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0291</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refrigerant compression by combined gas compression and liquid pumping</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0292" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0292</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refrigerant compression by cold or cryogenic suction of the refrigerant gas</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0294" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0294</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple compressor casings/strings in parallel, e.g. split arrangement</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0295" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Shifting of the compression load between different cooling stages within a refrigerant cycle or within a cascade refrigeration system</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0296" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J1/0297" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0297</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an externally chilled fluid, e.g. chilled water</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J1/0298" definition-exists="false" ipc-concordant="F25J1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J1/0298</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Safety aspects and control of the refrigerant compression system, e.g. anti-surge control</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F25J3/00" definition-exists="true" ipc-concordant="F25J3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus for separating the constituents of gaseous </text><CPC-specific-text><text>or liquefied gaseous</text></CPC-specific-text><text> mixtures involving the use of liquefaction or solidification</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J3/02" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/02</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream </text><reference><text><class-ref scheme="cpc">F25J3/08</class-ref> takes precedence </text><CPC-specific-text><text>; purification of hydrocarbons in general <class-ref scheme="cpc">C07C7/00</class-ref></text></CPC-specific-text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/0204" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/0204</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the feed stream </text><reference><text>for air <class-ref scheme="cpc">F25J3/04</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0209" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Natural gas or substitute natural gas</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/0214" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0214</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquefied natural gas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0219" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0219</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0223" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0223</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>H<sub>2</sub>/CO mixtures, i.e. synthesis gas; Water gas or shifted synthesis gas </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref>; production of hydrogen containing gas <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/0228" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/0228</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the separated product stream</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0233" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0233</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 1 carbon atom or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0238" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0238</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 2 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0242" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 3 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0247" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0247</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 4 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0252" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of hydrogen </text><reference><text>production of hydrogen containing gas in general <class-ref scheme="cpc">C01B3/00</class-ref>, e.g. separation of hydrogen or hydrogen containing gases form gaseous mixtures at low temperatures <class-ref scheme="cpc">C01B3/506</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0257" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0257</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of nitrogen </text><reference><text>from air <class-ref scheme="cpc">F25J3/04</class-ref>, production of nitrogen in general <class-ref scheme="cpc">C01B21/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0261" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0261</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of carbon monoxide </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0266" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0266</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of carbon dioxide </text><reference><text>production of carbon dioxide in general <class-ref scheme="cpc">C01B32/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0271" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0271</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of H<sub>2</sub>/CO mixtures, i.e. of synthesis gas </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref>, production of hydrogen containing gas <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0276" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of H<sub>2</sub>/N<sub>2</sub> mixtures, i.e. of ammonia synthesis gas </text><reference><text>in general <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/028" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of noble gases </text><reference><text>from air <class-ref scheme="cpc">F25J3/04642</class-ref>; in general <class-ref scheme="cpc">C01B23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/0285" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0285</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/029" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of helium</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/0295" definition-exists="false" ipc-concordant="F25J3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0295</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Start-up or control of the process; Details of the apparatus used, e.g. sieve plates, packings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/04" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>for air</text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04006" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04006</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Providing pressurised feed air or process streams within or from the air fractionation unit</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04012" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by compression of warm gaseous streams; details of intake or interstage cooling </text><reference><text><class-ref scheme="cpc">F25J3/04048</class-ref> takes precedence; operation of compressors <class-ref scheme="cpc">F25J3/04781</class-ref>; particular layout of compressors used in air fractionation units <class-ref scheme="cpc">F25J3/04866</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04018" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of main feed air</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04024" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of purified feed air, so-called boosted air</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0403" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0403</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04036" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04042" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon or argon enriched stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04048" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04054" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of air</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0406" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0406</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04066" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04072" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon or argon enriched stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04078" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04078</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression </text><reference><text>operation of pumps <class-ref scheme="cpc">F25J3/04781</class-ref>; particular layout of pumps used in air fractionation units <class-ref scheme="cpc">F25J3/04866</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04084" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of nitrogen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0409" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04096" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon or argon enriched stream</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04103" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using solely hydrostatic liquid head</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04109" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04109</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of compressors and /or their drivers </text><reference><text>using work extraction by mechanical coupling of compression and cold expansion <class-ref scheme="cpc">F25J3/04381</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04115" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04115</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>characterised by the type of prime driver, e.g. hot gas expander</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04121" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Steam turbine as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04127" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gas turbine as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04133" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electrical motor as the prime mechanical driver</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04139" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04139</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of different types of drivers mechanically coupled to the same compressor, possibly split on multiple compressor casings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04145" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Mechanically coupling of different compressors of the air fractionation process to the same driver(s)</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04151" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04151</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04157" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04157</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Afterstage cooling and so-called &quot;pre-cooling&quot; of the feed air upstream the air purification unit and main heat exchange line </text><reference><text><class-ref scheme="cpc">F25J3/04618</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04163" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hot end purification of the feed air </text><reference><text>arrangements of cold regenerators <class-ref scheme="cpc">F25J5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04169" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04169</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by adsorption of the impurities </text><reference><text>adsorption in general <class-ref scheme="cpc">B01D53/02</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04175" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04175</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at a pressure of substantially more than the highest pressure column</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04181" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Regenerating the adsorbents</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04187" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams </text><reference><text>arrangements of cold exchangers <class-ref scheme="cpc">F25J5/002</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04193" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04193</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Division of the main heat exchange line in consecutive sections having different functions</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/042" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having an intermediate feed connection</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04206" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including a so-called &quot;auxiliary vaporiser&quot; for vaporising and producing a gaseous product</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04212" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04212</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and simultaneously condensing vapor from a column serving as reflux within the or another column</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04218" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04218</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores </text><reference><text><class-ref scheme="cpc">F25J3/04503</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04224" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04224</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cores associated with a liquefaction or refrigeration cycle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0423" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Subcooling of liquid process streams</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04236" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration of different exchangers in a single core, so-called integrated cores </text><reference><text><class-ref scheme="cpc">F25J3/04624</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04242" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Cold end purification of the feed air</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04248" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04254" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the cold stored in external cryogenic fluids </text><reference><text>closed loop <class-ref scheme="cpc">F25J3/04278</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0426" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The cryogenic component does not participate in the fractionation</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04266" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and being liquefied hydrocarbons</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04272" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and comprising means for reducing the risk of pollution of hydrocarbons into the air fractionation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04278" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04284" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams </text><reference><text><class-ref scheme="cpc">F25J3/04333</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0429" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0429</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of feed air, e.g. used as waste or product air or expanded into an auxiliary column</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04296" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04296</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Claude expansion, i.e. expanded into the main or high pressure column</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04303" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04303</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lachmann expansion, i.e. expanded into oxygen producing or low pressure column</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04309" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04309</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of nitrogen</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04315" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04315</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lowest pressure or impure nitrogen, so-called waste nitrogen expansion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04321" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04321</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04327" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon or argon enriched stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04333" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04333</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04339" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04339</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of air</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04345" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and comprising a gas work expansion loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04351" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04351</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of nitrogen</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04357" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04357</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and comprising a gas work expansion loop</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04363" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of oxygen</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04369" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04369</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of argon or argon enriched stream</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04375" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04375</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details relating to the work expansion, e.g. process parameter etc.</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04381" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04381</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using work extraction by mechanical coupling of compression and expansion so-called companders</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04387" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04387</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using liquid or hydraulic turbine expansion</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04393" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04393</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiple or multistage gas work expansion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/044" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single pressure main column system only </text><reference><text><class-ref scheme="cpc">F25J3/0446</class-ref>, <class-ref scheme="cpc">F25J3/04624</class-ref>, <class-ref scheme="cpc">F25J3/04636</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04406" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04406</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using a dual pressure main column system </text><reference><text><class-ref scheme="cpc">F25J3/0446</class-ref>, <class-ref scheme="cpc">F25J3/04624</class-ref>, <class-ref scheme="cpc">F25J3/04636</class-ref> and <class-ref scheme="cpc">F25J3/04715</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04412" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04412</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04418" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with thermally overlapping high and low pressure columns</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04424" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>without thermally coupled high and low pressure columns, i.e. a so-called split columns</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/0443" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0443</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>A main column system not otherwise provided, e.g. a modified double column flowsheet</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04436" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04436</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using at least a triple pressure main column system </text><reference><text><class-ref scheme="cpc">F25J3/0446</class-ref>, <class-ref scheme="cpc">F25J3/04624</class-ref>, <class-ref scheme="cpc">F25J3/04636</class-ref> and <class-ref scheme="cpc">F25J3/04715</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04442" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04442</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a double column flowsheet with a high pressure pre-rectifier</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04448" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04448</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in a double column flowsheet with an intermediate pressure column</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04454" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>a main column system not otherwise provided, e.g. serially coupling of columns or more than three pressure levels</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0446" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0446</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the heat generated by mixing two different phases</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04466" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for producing oxygen as a mixing column overhead gas by mixing gaseous air feed and liquid oxygen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04472" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04472</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>using the cold from cryogenic liquids produced within the air fractionation unit and stored in internal or intermediate storages</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04478" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04478</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for controlling purposes, e.g. start-up or back-up procedures </text><reference><text><class-ref scheme="cpc">F25J3/04496</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04484" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04484</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for purity control during steady state operation</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0449" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for rapid load change of the air fractionation unit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04496" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04496</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for compensating variable air feed or variable product demand by alternating between periods of liquid storage and liquid assist</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04503" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04503</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by exchanging &quot;cold&quot; between at least two different cryogenic liquids, e.g. independently from the main heat exchange line of the air fractionation and/or by using external alternating storage systems</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04509" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04509</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>within the cold part of the air fractionation, i.e. exchanging &quot;cold&quot; within the fractionation and/or main heat exchange line</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04515" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04515</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simultaneously changing air feed and products output</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04521" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04521</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes </text><reference><text>combined plants, e.g. engine plant combined with an industrial process <class-ref scheme="cpc">F01K23/064</class-ref>; gas-turbine plants supplying working fluid to a chemical process <class-ref scheme="cpc">F02C6/10</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04527" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04527</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04533" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04533</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the direct combustion of fuels in a power plant, so-called &quot;oxyfuel combustion&quot;</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04539" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04539</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the H<sub>2</sub>/CO synthesis by partial oxidation or oxygen consuming reforming processes of fuels</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04545" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04545</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the gasification of solid or heavy liquid fuels, e.g. integrated gasification combined cycle [IGCC]</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04551" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04551</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for the metal production</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04557" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04557</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>for pig iron or steel making, e.g. blast furnace, Corex</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04563" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/04563</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04569" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04569</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for enhanced or tertiary oil recovery</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04575" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04575</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>for a gas expansion plant, e.g. dilution of the combustion gas in a gas turbine</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04581" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hot gas expansion of indirect heated nitrogen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04587" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04587</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>for the NH<sub>3</sub> synthesis, e.g. for adjusting the H<sub>2</sub>/N<sub>2</sub> ratio</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04593" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04593</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The air gas consuming unit is also fed by an air stream</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/046" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Completely integrated air feed compression, i.e. common MAC</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04606" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04606</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Partially integrated air feed compression, i.e. independent MAC for the air fractionation unit plus additional air feed from the air gas consuming unit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04612" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04612</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heat exchange integration with process streams, e.g. from the air gas consuming unit</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04618" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04618</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for cooling an air stream fed to the air fractionation unit</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04624" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04624</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using integrated mass and heat exchange, so-called non-adiabatic rectification, e.g. dephlegmator, reflux exchanger</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/0463" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simultaneously between rectifying and stripping sections, i.e. double dephlegmator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04636" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04636</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a hybrid air separation unit, e.g. combined process by cryogenic separation and non-cryogenic separation techniques </text><reference><text><class-ref scheme="cpc">F25J3/04733</class-ref> and <class-ref scheme="cpc">F25J3/04757</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04642" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04642</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Recovering noble gases from air </text><reference><text>from gas mixtures other than air <class-ref scheme="cpc">F25J3/028</class-ref> or <class-ref scheme="cpc">F25J3/0685</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04648" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04648</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>argon</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04654" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04654</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Producing crude argon in a crude argon column</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/0466" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a parallel working rectification column or auxiliary column system in a single pressure main column system</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04666" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04666</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as a parallel working rectification column of the low pressure column in a dual pressure main column system</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04672" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04672</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>having a top condenser</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="F25J3/04678" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04678</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>cooled by oxygen enriched liquid from high pressure column bottoms</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="F25J3/04684" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04684</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and a bottom re-boiler </text><reference><text><class-ref scheme="cpc">F25J3/04696</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="F25J3/0469" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0469</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and an intermediate re-boiler/condenser </text><reference><text><class-ref scheme="cpc">F25J3/04696</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="F25J3/04696" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04696</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>a bottom re-boiler and an intermediate re-boiler/condenser</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="F25J3/04703" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04703</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>being arranged in more than one vessel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04709" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04709</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>as an auxiliary column system in at least a dual pressure main column system</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04715" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04715</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>The auxiliary column system simultaneously produces oxygen</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04721" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04721</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Producing pure argon, e.g. recovered from a crude argon column</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04727" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04727</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using an auxiliary pure argon column for nitrogen rejection </text><reference><text><class-ref scheme="cpc">F25J3/04739</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04733" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04733</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a hybrid system, e.g. using adsorption, permeation or catalytic reaction</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04739" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04739</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in combination with an auxiliary pure argon column</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04745" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04745</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Krypton and/or Xenon</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04751" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04751</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Producing pure krypton and/or xenon recovered from a crude krypton/xenon mixture</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04757" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04757</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a hybrid system, e.g. using adsorption, permeation or catalytic reaction</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/04763" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/04763</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Start-up or control of the process; Details of the apparatus used</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04769" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04769</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Operation, control and regulation of the process; Instrumentation within the process</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04775" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04775</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Air purification and pre-cooling</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04781" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04781</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Pressure changing devices, e.g. for compression, expansion, liquid pumping</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04787" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04787</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Heat exchange, e.g. main heat exchange line; Subcooler, external reboiler-condenser </text><reference><text><class-ref scheme="cpc">F25J3/04793</class-ref> and <class-ref scheme="cpc">F25J3/0486</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04793" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04793</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rectification, e.g. columns; Reboiler-condenser </text><reference><text><class-ref scheme="cpc">F25J3/0486</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/048" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/048</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Argon recovery</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04806" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>High purity argon purification</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04812" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Different modes, i.e. &quot;runs&quot; of operation </text><reference><text><class-ref scheme="cpc">F25J3/04472</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04818" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Start-up of the process</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04824" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04824</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stopping of the process, e.g. defrosting or deriming; Back-up procedures</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/0483" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0483</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Rapid load change of the air fractionation unit</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04836" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J3/04836</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>Variable air feed, i.e. &quot;load&quot; or product demand during specified periods, e.g. during periods with high respectively low power costs </text><reference><text><class-ref scheme="cpc">F25J3/0483</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04842" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04842</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Intermittent process, so-called batch process</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04848" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04848</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Control strategy, e.g. advanced process control or dynamic modeling</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04854" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04854</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Safety aspects of operation</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/0486" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0486</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of vaporisers for oxygen enriched liquids, e.g. purging of liquids</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/04866" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Construction and layout of air fractionation equipments, e.g. valves, machines </text><reference><text><class-ref scheme="cpc">F25J5/00</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04872" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04878" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Side by side arrangement of multiple vessels in a main column system, wherein the vessels are normally mounted one upon the other or forming different sections of the same column </text><reference><text>multiple vessels of a crude argon column <class-ref scheme="cpc">F25J3/04703</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04884" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04884</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangement of reboiler-condensers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/0489" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0489</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout &quot;plot&quot; </text><reference><text><class-ref scheme="cpc">F25J3/04872</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04896" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04896</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of columns, e.g. internals, inlet/outlet devices</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04903" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04903</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plates or trays</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04909" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04909</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Structured packings</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04915" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of different material exchange elements, e.g. within different columns</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04921" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04921</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>within the same column</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04927" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquid or gas distribution devices</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04933" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Partitioning walls or sheets</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="F25J3/04939" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04939</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Vertical, e.g. dividing wall columns </text><reference><text>details of dephlegmators <class-ref scheme="cpc">F25J5/007</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04945" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04945</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of internal structure; insulation and housing of the cold box</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04951" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04951</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network </text><reference><text><class-ref scheme="cpc">F25J3/04636</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04957" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04957</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the &quot;front-end&quot;</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04963" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04963</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>and inter-connecting equipment within or downstream of the fractionation unit(s) </text><reference><text><class-ref scheme="cpc">F25J3/04393</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04969" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04969</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Retrofitting or revamping of an existing air fractionation unit</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="F25J3/04975" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04975</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for special use of the air fractionation unit, e.g. transportable devices by truck or small scale use</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04981" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04981</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for portable medical or home use</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04987" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04987</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for offshore use</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="F25J3/04993" definition-exists="false" ipc-concordant="F25J3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/04993</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for space applications, e.g. for rocket use</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J3/06" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/06</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>by partial condensation </text><reference><text><class-ref scheme="cpc">F25J3/08</class-ref> takes precedence; by rectification <class-ref scheme="cpc">F25J3/02</class-ref> </text><CPC-specific-text><text>; purification of hydrocarbons in general <class-ref scheme="cpc">C07C7/00</class-ref></text></CPC-specific-text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/0605" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/0605</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the feed stream </text><reference><text>for air <class-ref scheme="cpc">F25J3/04</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/061" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Natural gas or substitute natural gas</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/0615" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0615</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Liquefied natural gas</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/062" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0625" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0625</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>H<sub>2</sub>/CO mixtures, i.e. synthesis gas; Water gas or shifted synthesis gas </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref>; production of hydrogen containing gas <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/063" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J3/063</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>characterised by the separated product stream</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0635" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0635</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 1 carbon atom or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/064" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 2 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0645" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0645</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 3 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/065" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of CnHm with 4 carbon atoms or more</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0655" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0655</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of hydrogen </text><reference><text>production of hydrogen containing gas in general <class-ref scheme="cpc">C01B3/00</class-ref>, e.g. separation of hydrogen or hydrogen containing gases form gaseous mixtures at low temperatures <class-ref scheme="cpc">C01B3/506</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/066" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of nitrogen </text><reference><text>from air <class-ref scheme="cpc">F25J3/04</class-ref>, production of nitrogen in general <class-ref scheme="cpc">C01B21/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0665" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0665</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of carbon monoxide </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/067" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/067</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of carbon dioxide </text><reference><text>production of carbon dioxide in general <class-ref scheme="cpc">C01B32/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0675" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J3/0675</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>separation of H<sub>2</sub>/CO mixtures, i.e. of synthesis gas </text><reference><text>production of carbon monoxide containing gas in general <class-ref scheme="cpc">C01B32/40</class-ref>, <class-ref scheme="cpc">C10J</class-ref>, <class-ref scheme="cpc">C10K</class-ref>, production of hydrogen containing gas <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/068" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of H<sub>2</sub>/N<sub>2</sub> mixtures, i.e. of ammonia synthesis gas </text><reference><text>in general <class-ref scheme="cpc">C01B3/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="F25J3/0685" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>separation of noble gases </text><reference><text>from air <class-ref scheme="cpc">F25J3/04642</class-ref>; in general <class-ref scheme="cpc">C01B23/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="F25J3/069" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of helium</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J3/0695" definition-exists="false" ipc-concordant="F25J3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/0695</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Start-up or control of the process; Details of the apparatus used</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J3/08" definition-exists="false" ipc-concordant="F25J3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating gaseous impurities from gases or gaseous mixtures </text><CPC-specific-text><text>or from liquefied gases or liquefied gaseous mixtures</text></CPC-specific-text><reference><text>cold traps <class-ref scheme="cpc">B01D8/00</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="F25J5/00" definition-exists="true" ipc-concordant="F25J5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants </text><reference><text>heat exchangers <class-ref scheme="cpc">F28C</class-ref>, <class-ref scheme="cpc">F28D</class-ref>, <class-ref scheme="cpc">F28F</class-ref></text></reference></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="F25J5/002" definition-exists="false" ipc-concordant="F25J5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J5/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger</text></CPC-specific-text></title-part></class-title>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J5/005" definition-exists="false" ipc-concordant="F25J5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J5/005</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>in a reboiler-condenser, e.g. within a column</text></CPC-specific-text></title-part></class-title></classification-item>
<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="F25J5/007" definition-exists="false" ipc-concordant="F25J5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J5/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combined with mass exchange, i.e. in a so-called dephlegmator</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="F25J200/00" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/00</classification-symbol>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J200/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2200/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus using separation by rectification</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a single pressure main column system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a dual pressure main column system</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a triple pressure main column system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in a quadruple, or more, column or pressure system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in an elevated pressure multiple column system wherein the lowest pressure column is at a pressure well above the minimum pressure needed to overcome pressure drop to reject the products to atmosphere</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a side column in a single pressure column system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a side column fed by a stream from the high pressure column</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a side column fed by a stream from the low pressure column</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/38" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pre-separation or distributed distillation before a main column system, e.g. in a at least a double column system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Features relating to the provision of boil-up in the bottom of a column</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multiple (re-)boiler-condensers at different heights of the column</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in the high pressure column of a double pressure main column system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in the low pressure column of a double pressure main column system</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refluxing the column with at least a part of the totally condensed overhead gas</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/74" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refluxing the column with at least a part of the partially condensed overhead gas</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/76" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refluxing the column with condensed overhead gas being cycled in a quasi-closed loop refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/78" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refluxing the column with a liquid stream originating from an upstream or downstream fractionator column</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using integrated mass and heat exchange, i.e. non-adiabatic rectification in a reflux exchanger or dephlegmator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J200/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details relating to column internals, e.g. structured packing, gas or liquid distribution</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/92" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details relating to the feed point</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/94" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/94</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details relating to the withdrawal point</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J200/96" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2200/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dividing wall column</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="F25J205/00" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>&lt;NO TITLE&gt;</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J205/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2205/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus using other separation and/or other processing means</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using simple phase separation in a vessel or drum</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>in the feed line, i.e. upstream of the fractionation step</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using combined expansion and separation, e.g. in a vortex tube, &quot;Ranque tube&quot; or a &quot;cyclonic fluid separator&quot;, i.e. combination of an isentropic nozzle and a cyclonic separator</text></title-part><title-part><text>Centrifugal separation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using solidification of components</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F25J2205/24</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>using regenerators, cold accumulators or reversible heat exchangers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a washing, e.g. &quot;scrubbing&quot; or bubble column for purification purposes</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using hybrid system, i.e. combining cryogenic and non-cryogenic separation techniques</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using absorption, i.e. with selective solvents or lean oil, heavier CnHm and including generally a regeneration step for the solvent or lean oil</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Purifying more than one feed stream in multiple adsorption vessels, e.g. for two feed streams at different pressures</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/64" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by pressure-swing adsorption [PSA] at the hot end</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J205/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Regenerating the adsorption vessel, e.g. kind of reactivation gas</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F25J205/68" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooling the adsorption vessel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F25J205/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Heating the adsorption vessel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F25J205/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Pressurising or depressurising the adsorption vessel</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using membrane, i.e. including a permeation step</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/82" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a reactor with combustion or catalytic reaction</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/84" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using filter</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/86" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electrical phenomena, e.g. Corona discharge, electrolysis or magnetic field</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J205/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2205/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mixing of components</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J210/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2210/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes characterised by the type or other details of the feed stream</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J2210/02</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Multiple feed streams, e.g. originating from different sources</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mixing or blending of fluids with the feed stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Splitting of the feed stream, e.g. for treating or cooling in different ways</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Refinery or petrochemical off-gas</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coke-ovens gas</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>H<sub>2</sub>/CO mixtures, i.e. synthesis gas</text></title-part><title-part><text>Water gas, shifted synthesis gas or purge gas from HYCO synthesis</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>H<sub>2</sub>/N<sub>2</sub> mixture, i.e. synthesis gas for or purge gas from ammonia synthesis</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air or oxygen enriched air, i.e. generally less than 30mol% of O<sub>2</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Natural gas or synthetic natural gas [SNG]</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquefied natural gas [LNG]</text></title-part><title-part><text>Natural gas liquids [NGL]</text></title-part><title-part><text>Liquefied petroleum gas [LPG]</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Landfill or fermentation off-gas, e.g. &quot;Bio-gas&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Flue or combustion exhaust gas</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon dioxide</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J210/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2210/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boil-off gas from storage</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J215/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2215/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes characterised by the type or other details of the product stream</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mixing or blending of fluids to yield a certain product</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recovery of liquid products</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hydrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon monoxide</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>HYCO synthesis gas, e.g. H<sub>2</sub>/CO mixture</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ammonia synthesis gas, e.g. H<sub>2</sub>/N<sub>2</sub> mixture</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helium</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Neon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Krypton</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/36" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Xenon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Air or oxygen enriched air, i.e. generally less than 30mol% of O<sub>2</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Nitrogen or special cases, e.g. multiple or low purity N<sub>2</sub></text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J215/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ultra high purity nitrogen, i.e. generally less than 1 ppb impurities</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxygen or special cases, e.g. isotope-mixtures or low purity O<sub>2</sub></text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J215/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxygen production with multiple purity O<sub>2</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J215/54" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Oxygen production with multiple pressure O<sub>2</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J215/56" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ultra high purity oxygen, i.e. generally more than 99,9% O<sub>2</sub></text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Methane</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Ethane or ethylene</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/64" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Propane or propylene</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Butane or mixed butanes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J215/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2215/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carbon dioxide</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J220/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2220/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus involving steps for the removal of impurities</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating impurities in general from the feed stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating impurities in general from the product stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating high boiling, i.e. less volatile components from air, e.g. CO<sub>2</sub>, hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>F25J2220/42</classification-symbol><class-title date-revised="2016-08-01"><title-part><text>Separating low boiling, i.e. more volatile components from nitrogen, e.g. He, H<sub>2</sub>, Ne</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating high boiling, i.e. less volatile components from nitrogen, e.g. CO, Ar, O<sub>2</sub>, hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating low boiling, i.e. more volatile components from oxygen, e.g. N<sub>2</sub>, Ar</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating high boiling, i.e. less volatile components from oxygen, e.g. Kr, Xe, Hydrocarbons, Nitrous oxides, O<sub>3</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating low boiling components, e.g. He, H<sub>2</sub>, N<sub>2</sub>, Air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/64" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating acid gases, e.g. CO<sub>2</sub>, SO<sub>2</sub>, H<sub>2</sub>S or RSH</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/68" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating water or hydrates</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating impurities from carbon dioxide, e.g. H<sub>2</sub>O or water-soluble contaminants</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/82" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating low boiling, i.e. more volatile components, e.g. He, H<sub>2</sub>, CO, Air gases, CH<sub>4</sub></text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J220/84" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating high boiling, i.e. less volatile components, e.g. NOx, SOx, H2S</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J220/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2220/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Separating isotopes of a component, e.g. H<sub>2</sub>, O<sub>2</sub></text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J230/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2230/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus involving steps for increasing the pressure of gaseous process streams</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F25J2230/02</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Compressor intake arrangement, e.g. filtering or cooling</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Adiabatic compressor, i.e. without interstage cooling</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrated compressor and process expander</text></title-part><title-part><text>Gear box arrangement</text></title-part><title-part><text>Multiple compressors on a common shaft</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compressor driver arrangement, e.g. power supply by motor, gas or steam turbine</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple compressors or compressor stages in parallel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compression of the feed stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Compression of the product stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen enriched compared to air, e.g. &quot;crude oxygen&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being argon or crude argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being hydrocarbons or a mixture of hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J230/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2230/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being carbon dioxide</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J235/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2235/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a pump in general or hydrostatic pressure increase</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a pressure accumulator</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lifting of liquids by gas lift, e.g. &quot;Mammutpumpe&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen enriched compared to air (&quot;crude oxygen&quot;)</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being argon or crude argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being (a mixture of) hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J235/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2235/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being carbon dioxide</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J240/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2240/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus involving steps for expanding of process streams</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multiple expansion turbines in parallel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/22" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen enriched compared to air, e.g. &quot;crude oxygen&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/28" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being argon or crude argon</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dynamic liquid or hydraulic expansion with extraction of work, e.g. single phase or two-phase turbine</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/46" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/48" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the fluid being oxygen enriched compared to air, e.g. &quot;crude oxygen&quot;</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Expansion by ejector or injector, e.g. &quot;Gasstrahlpumpe&quot;, &quot;venturi mixing&quot;, &quot;jet pumps&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Steam turbine, e.g. used in a Rankine cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hot exhaust gas turbine combustion engine</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J240/82" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with waste heat recovery, e.g. in a combined cycle, i.e. for generating steam used in a Rankine cycle</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J240/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2240/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hot gas waste turbine of an indirect heated gas for power generation</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J245/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2245/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Processes or apparatus involving steps for recycling of process streams</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Recycle of a stream in general, e.g. a by-pass stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the recycled stream being air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the recycled stream being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the recycled stream being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the recycled stream being argon or crude argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J245/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2245/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the recycled stream being boil-off gas from storage</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J250/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2250/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Details related to the use of reboiler-condensers</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J250/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J250/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Down-flowing type boiler-condenser, i.e. with evaporation of a falling liquid film</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J250/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boiler-condenser with superposed stages</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J250/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J250/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J250/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One fluid being air</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J250/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One fluid being nitrogen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J250/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One fluid being oxygen</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J250/52" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One fluid being oxygen enriched compared to air, e.g. &quot;crude oxygen&quot;</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J250/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2250/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>One fluid being argon or crude argon</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J260/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2260/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Coupling of processes or apparatus to other units</text></title-part><title-part><text>Integrated schemes</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation for exchanging heat, e.g. for waste heat recovery</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in a gas transmission system at a pressure reduction, e.g. &quot;let down&quot; station</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation for liquefying or solidifying a fluid stream</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using renewable energy</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using nitrogen, e.g. as utility gas, for inerting or purging purposes in IGCC, POX, GTL, PSA, float glass forming, incineration processes, for heat recovery or for enhanced oil recovery</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J260/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using nitrogen for cooling purposes</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using oxygen, e.g. in the burner of a glass facility, waste incineration or oxygen based process [OBP] in general</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using argon</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using hydrocarbons, e.g. for fuel purposes</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J260/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2260/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integration in an installation using carbon dioxide, e.g. for EOR, sequestration, refrigeration etc.</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J270/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2270/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Refrigeration techniques used</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal refrigeration with liquid vaporising loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal refrigeration with work-producing gas expansion loop</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with multiple gas expansion loops</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Internal refrigeration by flash gas recovery loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External refrigeration with liquid vaporising loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/14" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External refrigeration with work-producing gas expansion loop</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/16" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with mutliple gas expansion loops of the same refrigerant</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/18" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External refrigeration with incorporated cascade loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external hydrogen refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/24" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external carbon monoxide refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external helium refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external air refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external nitrogen refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external oxygen refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/58" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external argon refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Closed external refrigeration cycle with single component refrigerant [SCR], e.g. C1-, C2- or C3-hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/66" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Closed external refrigeration cycle with multi component refrigerant [MCR], e.g. mixture of hydrocarbons</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal or closed external carbon dioxide refrigeration cycle</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/88" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Quasi-closed internal refrigeration or heat pump cycle, if not otherwise provided</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J270/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH<sub>3</sub>, unspecified external refrigeration</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/902" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/902</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details about the refrigeration cycle used, e.g. composition of refrigerant, arrangement of compressors or cascade, make up sources, use of reflux exchangers etc.</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/904" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/904</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by liquid or gaseous cryogen in an open loop</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/906" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/906</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by heat driven absorption chillers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/908" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/908</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by regenerative chillers, i.e. oscillating or dynamic systems, e.g. Stirling refrigerator, thermoelectric (&quot;Peltier&quot;) or magnetic refrigeration</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="F25J270/91" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/91</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using pulse tube refrigeration</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="F25J270/912" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2270/912</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Liquefaction cycle of a low-boiling (feed) gas in a cryocooler, i.e. in a closed-loop refrigerator</text></title-part></class-title></classification-item></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J280/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2280/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Control of the process or apparatus</text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control in general, load changes, different modes (&quot;runs&quot;), measurements</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control for or during start-up and cooling down of the installation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control for stopping, deriming or defrosting after an emergency shut-down of the installation or for back up system</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of a discontinuous or intermittent (&quot;batch&quot;) process</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Control of freezing of components</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J280/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2280/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Advanced process control, e.g. adaptive or multivariable control</text></title-part></class-title></classification-item></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="F25J290/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>F25J2290/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Other details not covered by groups <class-ref scheme="cpc">F25J2200/00</class-ref> - <class-ref scheme="cpc">F25J2280/00</class-ref></text></title-part></class-title>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Comparison of processes or apparatuses</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Mathematical formulae, modeling, plot or curves</text></title-part><title-part><text>Design methods</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/12" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particular process parameters like pressure, temperature, ratios</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/20" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>F25J2290/20</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Particular dimensions</text></title-part><title-part><text>Small scale or microdevices</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/30" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details about heat insulation or cold insulation</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/32" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details on header or distribution passages of heat exchangers, e.g. of reboiler-condenser or plate heat exchangers</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/34" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details about subcooling of liquids</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/40" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Vertical layout or arrangement of cold equipments within in the cold box, e.g. columns, condensers, heat exchangers etc.</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/42" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/44" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Particular materials used, e.g. copper, steel or alloys thereof or surface treatments used, e.g. enhanced surface</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/50" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Arrangement of multiple equipments fulfilling the same process step in parallel</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/60" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details about pipelines, i.e. network, for feed or product distribution</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/62" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>F25J2290/62</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Details of storing a fluid in a tank</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/70" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing device is mobile or transportable, e.g. by hand, car, ship, rocket engine etc.</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/72" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Processing device is used off-shore, e.g. on a platform or floating on a ship or barge</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/80" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Retrofitting, revamping or debottlenecking of existing plant</text></title-part></class-title></classification-item>
<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="F25J290/90" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>F25J2290/90</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details about safety operation of the installation</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme>