EP0661505B1 - Verfahren und Einrichtung zur Gasverflüssigung - Google Patents

Verfahren und Einrichtung zur Gasverflüssigung Download PDF

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Publication number
EP0661505B1
EP0661505B1 EP94402787A EP94402787A EP0661505B1 EP 0661505 B1 EP0661505 B1 EP 0661505B1 EP 94402787 A EP94402787 A EP 94402787A EP 94402787 A EP94402787 A EP 94402787A EP 0661505 B1 EP0661505 B1 EP 0661505B1
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EP
European Patent Office
Prior art keywords
turbine
gas
cycle
compression
air
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Expired - Lifetime
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EP94402787A
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English (en)
French (fr)
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EP0661505A1 (de
Inventor
Bernard Darredeau
Philippe Fraysse
Corinne Garot
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Classifications

    • 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
    • F25J3/04278—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units
    • 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
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04296—Claude expansion, i.e. expanded into the main or high pressure column
    • 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
    • F25J3/04339—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 air
    • F25J3/04345—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 air 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
    • F25J3/04248—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
    • F25J3/04248—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
    • F25J3/02—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
    • F25J3/04406—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 using a dual pressure main column system
    • F25J3/04412—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 using a dual pressure main column system 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
    • 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
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/939—Partial feed stream expansion, air

Definitions

  • the present invention relates to a process for liquefying a gas by means of a refrigeration cycle comprising a heat exchange line, a so-called expansion turbine “Hot” and a so-called “cold” expansion turbine supplied respectively at a first temperature and at a second temperature below the first temperature and at least two stages of gas compression cycle, in which the two turbines are supplied with two fractions of the gas cycle at the same inlet pressure and at least part of it is returned gas from each turbine at the suction of a compression stage, after having heated it to room temperature in the exchange line.
  • a so-called expansion turbine "Hot” and a so-called “cold” expansion turbine supplied respectively at a first temperature and at a second temperature below the first temperature and at least two stages of gas compression cycle, in which the two turbines are supplied with two fractions of the gas cycle at the same inlet pressure and at least part of it is returned gas from each turbine at the suction of a compression stage, after having heated it to room temperature in the exchange line.
  • DE-A-2 636 933 and DE-A-1 902 601 describe a process using a "hot” turbine and "cold” turbine, each coupled to a cycle compressor.
  • the outlet pressures of the two turbines are equal, as well as their inlet pressures.
  • the object of the invention is to provide a method of this type having a particularly high yield.
  • the invention relates to a process of the aforementioned type, characterized in that the cycle gas is expanded in the hot turbine up to a first exhaust pressure, and the cycle gas is relaxed in the cold turbine up to a second exhaust pressure lower than the first exhaust pressure.
  • the invention also relates to an installation for liquefying a gas intended for the implementation of the process defined above.
  • This installation of the type comprising a heat exchange line, a turbine so-called “hot” expansion, a so-called “cold” expansion turbine, means of cycle compression, comprising at least two compression stages of cycle in series, the admissions of the two turbines being connected to the discharge of the same cycle compression stage, the output of each turbine being connected to the suction of a compression stage, means for sending two fractions of a cycle gas respectively to the two turbines and means to heat at least part of the expanded gas in each turbine to room temperature before sending it to the suction of a means of compression is characterized in that the exhaust from the hot turbine is connected to the suction of a cycle compression stage, and the exhaust of the cold turbine is connected to the suction of a cycle compression stage inferior.
  • the installation comprises a main compressor 6 for atmospheric air, an apparatus 7 for purifying air in water and in anhydride carbonic adsorption, a cycle compressor 8 to two stages 9 and 10 in series, a hot turbine 11 braked by an alternator 12 and a cold turbine 13 braked by an alternator 14.
  • atmospheric air at to be treated is compressed in 6 to the medium pressure P1, which is the operating pressure of column 3 and which is typically between 5 and 6 bars absolute, then is purified in 7 and compressed again in 9 to one intermediate pressure P2 then in 10 to a high cycle pressure P3, typically of the order of 30 to 100 absolute bars.
  • a first fraction of the air at this high P3 cycle pressure is cooled down to a temperature intermediate T1 in the hot part of the line heat exchange 2, then exit therefrom and introduced into the hot turbine 11. It emerges from the latter at the inter-stage pressure P2 of the compressor 8, is warmed up to temperature ambient in the hot part of the exchange line thermal, and is returned to the second stage intake 10 of the same compressor 8.
  • the rest of the air at the high pressure of P3 cycle is cooled in 2 to a second temperature intermediate T2 lower than T1. At this temperature, part of the air has left the exchange line thermal and introduced into the cold turbine 13, whence it comes out at medium pressure P1 and at temperature the cold end of the heat exchange line. This air turbined is partly heated in 15 from the cold end to hot end of the heat exchange line and returned to the suction of the first stage 9 of the compressor 8, and for part sent to the tank in column 3.
  • the rest of the air high pressure cooled to temperature T2 continues to cool in 16 until the cold end of the heat exchange line 2, which causes its liquefaction, then is relaxed at medium pressure P1 in an expansion valve 17 and is sent to the tank of the column 3.
  • a refrigeration unit 18 to precool at least one of the two high air streams pressure from compressor 8.
  • the electrical energy produced by the two turbines in alternators 12 and 14 can be used for driving the cycle compressor 8.
  • the refrigeration cycle is used to liquefy withdrawn nitrogen at the head of the medium pressure column 3.
  • the compressor cycle 8 is a three-stage nitrogen compressor, whose first stages 9 and 10 correspond to the two stages 9 and 10 of Figure 1 and are followed by a stage additional 19 in series delivering the nitrogen to be liquefied under a high liquefaction pressure P4 greater than the highest pressure P3 in the cycle.
  • the hot turbine 11 and the cold turbine 13 are both powered by the gas from the second stage 10, and the gas from the turbine 11 is returned to the suction of this second stage 10.
  • all of the gas from of the cold turbine 13 is combined with the nitrogen withdrawn from the head of column 3 via a pipe 20, heated in 2 to room temperature and returned to the suction of the first stage 9.
  • the nitrogen from of stage 10 which is not sent to the turbines is compressed again in 19, then cooled from the hot end at the cold end of the heat exchange line, which causes its liquefaction. Then this liquid nitrogen high pressure is relaxed to medium pressure in a expansion valve 21 and introduced under reflux at the head of the column 3.

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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)

Claims (9)

  1. Verfahren zur Verflüssigung eines Gases mittels eines Kühlkreises, der eine Wärmeaustauschleitung (2), eine sogenannte "warme" Entspannungsturbine (11) und eine sogenannte "kalte" Entspannungsturbine (13), die bei einer ersten Temperatur (T1) bzw. einer unterhalb der ersten Temperatur liegenden zweiten Temperatur (T2) betrieben werden, und mindestens zwei Stufen (9, 10) zur Verdichtung von Kreisgas umfaßt, und in dem die zwei Turbinen (11, 13) mit zwei Fraktionen des Kreisgases, die unter dem selben Einlaßdruck (P3) stehen, versorgt werden und mindestens ein Teil des Gases aus (11, 13) jeder Turbine, nachdem es in der Austauschleitung auf Umgebungstemperatur angewärmt wurde, der Saugseite einer Verdichtungsstufe (10, 9) zugeführt wird, dadurch gekennzeichnet, daß das Kreisgas in der warmen Turbine (11) auf einen ersten Auslaßdruck (P2) und das Kreisgas in der kalten Turbine auf einen zweiten Auslaßdruck (P1) entspannt wird, der niedriger als der erste Auslaßdruck (P2) ist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein Teil des Kreisgases das zu verflüssigende Gas bildet und, nachdem es den zwei Verdichtungsstufen und gegebenenfalls einer zusätzlichen Verdichtung (in 19) unterzogen wurde, verflüssigt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das zu verflüssigende Gas Luft oder eine Luftgas ist und nach Verflüssigung und Entspannung (in 17; 21) in eine Luftdestillationsvorrichtung (1) eingeleitet wird.
  4. Verfahren nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß der Auslaßdruck der kalten Turbine (13) ein Betriebsdruck der Destillationsvorrichtung (1) ist und ein Teil des aus dieser kalten Turbine stammenden Gases in den entsprechenden Bereich (3) der Destillationsvorrichtung eingeleitet wird.
  5. Anlage zur Verflüssigung eines Gases, umfassend eine Wärmeaustauschleitung (2), eine sogenannte "warme" Entspannungsturbine (11), eine sogenannte "kalte" Entspannungsturbine (13), Kreisverdichtungsmittel, die mindestens zwei in Reihe angeordnete Verdichtungsstufen (9, 10) umfassen, wobei die Einlässe der zwei Turbinen (11, 13) mit dem Auslaß der selben Verdichtungsstufe (10) des Kreises verbunden sind und der Auslaß jeder Turbine mit der Saugseite einer Verdichtungsstufe verbunden ist, Mittel zum Einleiten von zwei Fraktionen eines Kreisgases in die zwei entsprechende Turbinen und Mittel (2) zum Anwärmen mindestens eines Teils des in jeder Turbine entspannten Gases auf Umgebungstemperatur, bevor es der Saugseite eines Verdichtungsmittels zugeführt wird, dadurch gekennzeichnet, daß der Auslaß der warmen Turbine (11) mit der Saugseite einer Verdichtungsstufe (10) des Kreises und der Auslaß der kalten Turbine (13) mit der Saugseite einer unteren Verdichtungsstufe des Kreises (9) verbunden ist.
  6. Anlage nach Anspruch 5, dadurch gekennzeichnet, daß die Saugseite der ersten Verdichtungsstufe des Kreises (9) auch mit dem Auslaß eines Hauptluftverdichters (6) einer Vorrichtung zur Luftdestillation verbunden ist und der Auslaß der kalten Turbine (13) auch mit einem Bereich (3) einer Vorrichtung zur Luftdestillation (1) dieser Anlage verbunden ist, der unter dem Auslaßdruck der kalten Turbine arbeitet.
  7. Anlage nach Anspruch 5, dadurch gekennzeichnet, daß die Saugseite der ersten Verdichtungsstufe des Kreises (9) auch mit einem Bereich (3) einer Vorrichtung zur Luftdestillation (1) verbunden ist, der unter dem Ansaugdruck dieser Stufe arbeitet, und der Auslaß der letzten Verdichtungsstufe des Kreises (10), gegebenenfalls über zusätzliche Verdichtungsmittel (19), über die Wärmeaustauschleitung (2) und ein Entspannungsmittel (21) mit diesem Bereich (3) der Vorrichtung zur Luftdestillation verbunden ist.
  8. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Kreisverdichtungsmittel (9, 10) ein einziger mehrstufigen Verdichter sind, und zumindest der Auslaß der warmen Turbine (11) mit einem auf einer Zwischenstufe befindlichen Saugeinlaß dieses Verdichters verbunden ist.
  9. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß sie zudem eine Kühlgruppe (18) zur Vorkühlung mindestens eines zu entspannenden Gasstromes umfaßt.
EP94402787A 1993-12-31 1994-12-05 Verfahren und Einrichtung zur Gasverflüssigung Expired - Lifetime EP0661505B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9315959 1993-12-31
FR9315959A FR2714721B1 (fr) 1993-12-31 1993-12-31 Procédé et installation de liquéfaction d'un gaz.

Publications (2)

Publication Number Publication Date
EP0661505A1 EP0661505A1 (de) 1995-07-05
EP0661505B1 true EP0661505B1 (de) 1998-05-27

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EP94402787A Expired - Lifetime EP0661505B1 (de) 1993-12-31 1994-12-05 Verfahren und Einrichtung zur Gasverflüssigung

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Country Link
US (1) US5454226A (de)
EP (1) EP0661505B1 (de)
JP (1) JPH07324857A (de)
CN (1) CN1107571A (de)
CA (1) CA2139304A1 (de)
DE (1) DE69410584T2 (de)
ES (1) ES2119115T3 (de)
FR (1) FR2714721B1 (de)

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FR2652409A1 (fr) * 1989-09-25 1991-03-29 Air Liquide Procede de production frigorifique, cycle frigorifique correspondant et leur application a la distillation d'air.
GB9008752D0 (en) * 1990-04-18 1990-06-13 Boc Group Plc Air separation
JP2909678B2 (ja) * 1991-03-11 1999-06-23 レール・リキード・ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード 圧力下のガス状酸素の製造方法及び製造装置
GB9124242D0 (en) * 1991-11-14 1992-01-08 Boc Group Plc Air separation
US5275003A (en) * 1992-07-20 1994-01-04 Air Products And Chemicals, Inc. Hybrid air and nitrogen recycle liquefier

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DE69410584D1 (de) 1998-07-02
EP0661505A1 (de) 1995-07-05
JPH07324857A (ja) 1995-12-12
CN1107571A (zh) 1995-08-30
DE69410584T2 (de) 1999-03-04
CA2139304A1 (fr) 1995-07-01
ES2119115T3 (es) 1998-10-01
FR2714721A1 (fr) 1995-07-07
FR2714721B1 (fr) 1996-02-16
US5454226A (en) 1995-10-03

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