EP1544560A1 - Procédé et dispositif pour la production d'azote liquide - Google Patents

Procédé et dispositif pour la production d'azote liquide Download PDF

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Publication number
EP1544560A1
EP1544560A1 EP04029742A EP04029742A EP1544560A1 EP 1544560 A1 EP1544560 A1 EP 1544560A1 EP 04029742 A EP04029742 A EP 04029742A EP 04029742 A EP04029742 A EP 04029742A EP 1544560 A1 EP1544560 A1 EP 1544560A1
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EP
European Patent Office
Prior art keywords
stream
pressure recycle
recycle stream
distillation column
nitrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP04029742A
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German (de)
English (en)
Inventor
Paul Musicus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde Process Plants Inc
Original Assignee
Linde BOC Process Plants LLC
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Filing date
Publication date
Application filed by Linde BOC Process Plants LLC filed Critical Linde BOC Process Plants LLC
Publication of EP1544560A1 publication Critical patent/EP1544560A1/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04351—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen
    • F25J3/04357—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of nitrogen and comprising a gas work expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • F25J3/04224—Cores associated with a liquefaction or refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/08—Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases or liquefied gaseous mixtures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/76—Refluxing the column with condensed overhead gas being cycled in a quasi-closed loop refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/04—Recovery of liquid products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/42—Nitrogen or special cases, e.g. multiple or low purity N2
    • F25J2215/44—Ultra high purity nitrogen, i.e. generally less than 1 ppb impurities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/44—Separating high boiling, i.e. less volatile components from nitrogen, e.g. CO, Ar, O2, hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop
    • F25J2270/06—Internal refrigeration with work-producing gas expansion loop with multiple gas expansion loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/08—Internal refrigeration by flash gas recovery loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/42—Quasi-closed internal or closed external nitrogen refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/34—Details about subcooling of liquids

Definitions

  • the invention relates to a process and an apparatus for producing liquid nitrogen from air or high-purity liquid nitrogen from impure nitrogen incorporating a single distillation column.
  • Single-column processes for producing nitrogen from air are known from DE 1199293, GB 1258568, DE 4030750, or US 6470707 B2.
  • Nitrogen purification by single-column distillation is done in EP 1336806, US 3370435, or US 6276172 B1.
  • the invention comprises a process and an apparatus for producing high-purity liquid nitrogen from an impure nitrogen feed stream, the process comprising the following steps:
  • the invention comprises a process for producing liquid nitrogen comprising the following steps:
  • Such process may or may not use a feed compressor for compressing the nitrogen-containing mixture.
  • High-purity nitrogen means a nitrogen fraction with a total molar content of impurities of 1 % or less, preferably 1000 or less, more preferably 100 ppm or less,
  • Imprint nitrogen stream means a fraction having a molar nitrogen concentration higher than atmospheric air, but lower than the high-purity liquid nitrogen product.
  • a "nitrogen-containing mixture” may be constituted by any fluid containing nitrogen, e.g. by atmospheric air.
  • the liquid nitrogen product is at least partially withdrawn neither from the distillation column nor from one of its condensers, but taken from the working fluid of a recycle system comprising at least a recycle compressor and at least one turbine. Nitrogen gas from the column is used as working fluid of the recycle system.
  • the distillation column has a reboiler which is heated by a portion of the work fluid of the recycle system. Such portion is thereby condensed and led to the column as reflux liquid.
  • the distillation column does not have a head condenser.
  • the liquid formed in the reboiler and/or a portion of the liquefied work fluid of the recycle system provide reflux for the distillation column.
  • distillation has no further reboiler than the bottom reboiler driven by work fluid from the recycle.
  • the recycle system may comprise one, two or more turbines.
  • the single drawing shows an embodiment of the invention for producing high-purity liquid nitrogen from an impure nitrogen stream.
  • An impure nitrogen feed stream 1 has a pressure of about 5.4 bars and a total impurity content of about 1000 ppm, including an oxygen content of about 190 ppm, the remainder being exclusively nitrogen.
  • the feed stream 1 is fed under about ambient or higher temperature (e. g. 320 K) into a main heat exchanger 2 where it is cooled in indirect heat exchange with cold streams close to its dew point.
  • the cold feed stream 3 is fed into a distillation system, which comprises a single column 4 operating at a pressure of about 5.3 bars (at the bottom).
  • the feed stream oxygen content is further reduced by countercurrent heat and mass exchange.
  • high-purity gaseous nitrogen 5 is withdrawn from the upper section of the distillation column 4, preferably from its top. Via line 6, it is introduced into the cold end of main heat exchanger 2, where it is warmed to about ambient or higher temperature.
  • the warm high-purity gaseous nitrogen 7 is compressed in a recycle compressor 8 having an aftercooler 9.
  • High-pressure recycle stream 10 is divided into a first partial stream 11 and a second partial stream 12.
  • the first partial stream 11 is further compressed in two serially connected boosters 13, 15 with aftercoolers 14, 16.
  • the further compressed first partial stream 17 is introduced into the warm end of the main heat exchanger 2.
  • a first intermediate temperature it is partially withdrawn via line 18 from the main heat exchanger 2 and fed to a cold expansion turbine 19, where it is work expanded to a pressure of about 6 bars.
  • the expanded first partial stream 20 leaves turbine 19 and is introduced into a phase separator 21. (Alternatively, turbine output stream 20 may be directly introduced into line 22.)
  • the remainder of the first partial stream continues its cooling up to the cold end of the main heat exchanger 2 or somewhat above and is finally introduced via line 42 and throttling valve 43 into the phase separator 21.
  • the gaseous fraction 22 from phase separator 21 is split into a recycling portion 23 and a bottom reboiler portion 24.
  • the recycling portion is admixed to the high-purity gaseous nitrogen 5 re-warmed in the main heat exchanger 2 and recycled to the inlet of recycle compressor 8.
  • the other portion 24 is fed to a bottom reboiler 25 of the distillation column 4, substantially totally or totally condensed and fed via line 26 and throttling valve 27 into the upper section of the distillation column 4 in order to be used as liquid reflux.
  • a portion 29, 31 of the liquid fraction 28 from phase separator 21 is subcooled in subcooler 30 and recovered as the high-purity liquid nitrogen product (LIN) having an oxygen content of 10 ppm and a total impurity content of 100 ppm.
  • the remainder 32 of the liquid fraction 28 from phase separator 21 is fed via throttling valve 33 as further reflux liquid to the upper section of distillation column 4.
  • liquid nitrogen reflux stream 32 may be withdrawn from downstream subcooler 30.
  • the second partial stream 12 of high-pressure recycle stream 10 is led to the warm end of main heat exchanger 2 without being further compressed.
  • the second partial stream is withdrawn via line 35 from the main heat exchanger 2 and fed to a warm expansion turbine 36, where it is work expanded to a pressure of about 6 bars.
  • the second partial stream leaves turbine 36 as a gaseous stream 37 and is added to the other nitrogen return streams at a third intermediate temperature of the main heat exchanger 2 being close to the first intermediate temperature, and finally recycled to the recycle compressor 8.
  • a liquid nitrogen stream having an elevated concentration of lower boiling components is withdrawn in liquid form via line 38, throttled to about atmospheric pressure in valve 39, warmed in subcooler 30, introduced into the cold end of main heat exchanger 2 via line 40, evaporated and warmed therein, and finally withdrawn as an impure product or released to the atmosphere via line 41.
  • lower boiling components e.g. about 1200 ppm oxygen
  • the turbines 19, 36 drive the boosters 13, 15 by direct mechanical coupling.
  • one or both turbines can be connected to any other known braking device as e.g. a dissipative brake or an electric generator.
  • the respective booster would be omitted in such case.
  • the main heat exchanger 2 and the subcooler 30 are realized as a single block. Alternatively, they could be manufactured as two or more separate blocks.
  • the process and apparatus of the embodiment can be used for the purification of any impure nitrogen feed stream. Even air can be used as feed, so that it becomes a single column air separation unit. In this case, the bottom liquid 38 of the distillation column 4 would constitute the oxygen-enriched product of the air separation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP04029742A 2003-12-19 2004-12-15 Procédé et dispositif pour la production d'azote liquide Withdrawn EP1544560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53064103P 2003-12-19 2003-12-19
US530641P 2003-12-19

Publications (1)

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EP1544560A1 true EP1544560A1 (fr) 2005-06-22

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EP04029742A Withdrawn EP1544560A1 (fr) 2003-12-19 2004-12-15 Procédé et dispositif pour la production d'azote liquide

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009243739A (ja) * 2008-03-31 2009-10-22 Taiyo Nippon Sanso Corp 液化窒素製造方法及び装置
US20150168058A1 (en) * 2013-12-17 2015-06-18 L'air Liquide, Societe Anonyme Pour I'etude Et I'exploitation Des Procedes Georges Claude Apparatus for producing liquid nitrogen

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507127A (en) * 1967-12-26 1970-04-21 Phillips Petroleum Co Purification of nitrogen which contains methane
GB1258568A (fr) * 1968-08-21 1971-12-30
GB1392294A (en) * 1971-06-28 1975-04-30 British Oxygen Co Ltd Air separation
US3886758A (en) * 1969-09-10 1975-06-03 Air Liquide Processes for the production of nitrogen and oxygen
US4464188A (en) * 1983-09-27 1984-08-07 Air Products And Chemicals, Inc. Process and apparatus for the separation of air
US4861361A (en) * 1988-09-27 1989-08-29 The Boc Group, Inc. Argon and nitrogen coproduction process
DE4030750A1 (de) * 1990-09-28 1992-04-02 Linde Ag Verfahren und vorrichtung zur tieftemperaturzerlegung von luft
JPH06101962A (ja) * 1992-09-17 1994-04-12 Nippon Sanso Kk 超臨界ガスの液化方法及び装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507127A (en) * 1967-12-26 1970-04-21 Phillips Petroleum Co Purification of nitrogen which contains methane
GB1258568A (fr) * 1968-08-21 1971-12-30
US3886758A (en) * 1969-09-10 1975-06-03 Air Liquide Processes for the production of nitrogen and oxygen
GB1392294A (en) * 1971-06-28 1975-04-30 British Oxygen Co Ltd Air separation
US4464188A (en) * 1983-09-27 1984-08-07 Air Products And Chemicals, Inc. Process and apparatus for the separation of air
US4861361A (en) * 1988-09-27 1989-08-29 The Boc Group, Inc. Argon and nitrogen coproduction process
DE4030750A1 (de) * 1990-09-28 1992-04-02 Linde Ag Verfahren und vorrichtung zur tieftemperaturzerlegung von luft
JPH06101962A (ja) * 1992-09-17 1994-04-12 Nippon Sanso Kk 超臨界ガスの液化方法及び装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 380 (M - 1639) 18 July 1994 (1994-07-18) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009243739A (ja) * 2008-03-31 2009-10-22 Taiyo Nippon Sanso Corp 液化窒素製造方法及び装置
US20150168058A1 (en) * 2013-12-17 2015-06-18 L'air Liquide, Societe Anonyme Pour I'etude Et I'exploitation Des Procedes Georges Claude Apparatus for producing liquid nitrogen
WO2015095040A3 (fr) * 2013-12-17 2015-11-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Appareil de production d'azote liquide

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