EP0628777A1 - Procédé et dispositif d'obtention d'argon - Google Patents

Procédé et dispositif d'obtention d'argon Download PDF

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Publication number
EP0628777A1
EP0628777A1 EP94107374A EP94107374A EP0628777A1 EP 0628777 A1 EP0628777 A1 EP 0628777A1 EP 94107374 A EP94107374 A EP 94107374A EP 94107374 A EP94107374 A EP 94107374A EP 0628777 A1 EP0628777 A1 EP 0628777A1
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EP
European Patent Office
Prior art keywords
column
argon
fraction
semi
crude argon
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.)
Granted
Application number
EP94107374A
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German (de)
English (en)
Other versions
EP0628777B1 (fr
Inventor
Horst Dipl.-Ing. Corduan
Hartwin Dipl.-Ing. Lindner
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 GmbH
Original Assignee
Linde GmbH
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Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP0628777A1 publication Critical patent/EP0628777A1/fr
Application granted granted Critical
Publication of EP0628777B1 publication Critical patent/EP0628777B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25J3/04151—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
    • F25J3/0423—Subcooling of liquid process streams
    • 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
    • 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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
    • 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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
    • 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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/58—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being argon or crude argon
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being oxygen
    • 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
    • Y10S62/923—Inert gas
    • Y10S62/924—Argon

Definitions

  • the invention relates to a method and a device for the production of argon, in which method air is broken down in a rectification system with at least one air separation column and one crude argon column, an argon-containing oxygen fraction being removed from the air separation column and introduced into a raw argon column, in the upper region of the A crude argon fraction is taken from the crude argon column and a first reflux liquid is added, and a first residual fraction is taken off in the lower region of the crude argon column.
  • EP-B-377 117 discloses a special method of this type which provides for a particularly high number of theoretical plates in the crude argon column and the use of packing or packing in the crude argon column. In this way it is possible to achieve very low oxygen concentrations in the crude argon product.
  • the overall height of a crude argon column, including the top condenser is very great when packs which correspond to a large number of theoretical plates are used, so that they may reach or even exceed the height of the air separation column (s) for oxygen and nitrogen extraction.
  • a complex design of the insulating sheathing of the rectification columns may be necessary.
  • the invention is therefore based on the object of developing a method and a device of the type mentioned at the outset which are distinguished by particularly high economic efficiency, in particular by relatively little outlay in terms of apparatus for the production of crude argon.
  • This object is achieved in that the crude argon fraction is introduced into the lower region of a semi-pure column, an argon fraction depleted in oxygen being removed in the upper region of the semi-pure column and a second reflux liquid being added and a second residual fraction being removed in the lower region of the semi-pure column forms the first return liquid for the crude argon column.
  • the reflux liquid is thus formed by the liquid of a further rectification column, into which the crude argon product is conversely introduced.
  • a head capacitor for the crude argon column can thus be dispensed with.
  • the product fraction from the crude argon column is further depleted of oxygen in the semi-pure column.
  • a semi-pure column By using a semi-pure column, an essentially oxygen-free argon product can be obtained, the overall height of the crude argon column not only being reduced by dispensing with a top condenser, but also overall being able to be adapted very flexibly to the conditions of the entire air separation plant. It is deliberately avoided to achieve the lowest possible oxygen concentration in the crude argon column.
  • the method according to the invention offers economic advantages by reducing the size of the crude argon column, which in many cases outweigh the costs of the additional column.
  • the oxygen-depleted argon fraction is withdrawn as a product or intermediate product in gaseous or liquid form. It can be further cleaned, for example in a pure argon column, in particular freed of nitrogen.
  • the pressure in the lower region of the semi-pure column is preferably substantially equal to the pressure in the upper region of the crude argon column.
  • the return liquid for the semi-pure column can in principle be generated by condensation of the corresponding top fraction or can be supplied from another source.
  • At least part of the argon fraction from the upper region of the semi-pure column is preferably condensed by indirect heat exchange, at least part of the condensate forming the second reflux liquid.
  • a top condenser is generally arranged above the rectification area of the semi-pure column.
  • the liquid fraction evaporating against the condensing argon fraction is preferably formed from the pressure column by oxygen-enriched liquid.
  • the evaporated liquid fraction is then fed into the low pressure column.
  • Packings and / or ordered packings are preferably used as mass transfer elements in crude argon and / or semi-pure columns. Ordered packings are preferred because of their particularly low pressure drop. Packings or packings, in particular ordered packings, can also be used in the other rectification columns used in the process, for example in the low-pressure column of a two-stage air separator.
  • any ordered pack can be used in the method according to the invention.
  • the use of internals such as are described in the not previously published documents WO 93/19335 or WO 93/19336 is favorable.
  • the invention also relates to an apparatus for the production of argon according to claims 8 to 13.
  • an air separation process for generating oxygen and nitrogen with a double column 1, which consists of a pressure column 2 and a low pressure column 3, is indicated.
  • the invention does not depend on the special design of this process section, but can also be applied to other forms of this part of the process or the device, for example to a system with a single column or to different types of product removal of nitrogen and oxygen. Details such as turbines for the cooling relief of process streams or direct feeding of air into the low pressure column are not shown in the simplified diagram.
  • an argon-containing oxygen stream 4 which also contains impurities in the form of nitrogen and other air constituents, is taken from a location of relatively high argon concentration in the low-pressure column 3, and is separated into crude argon 6 and a first residual fraction 8 in a crude argon column 5. The latter is returned to the low-pressure column 3, possibly by means of a pump (not shown), and is fed back somewhat below the removal point for the argon-containing oxygen stream.
  • crude argon 6 obtained at the top of the crude argon column 5 is subjected to a further rectification step in a semi-pure column 9 to remove less volatile components, in particular oxygen.
  • the raw argon is preferably fed in gaseous form into the lower region of this column 9.
  • Argon depleted in oxygen is withdrawn from the upper region of the semi-pure column 9 in gaseous form (10) and / or liquid (15).
  • Return liquid 11 for the semi-pure column is generated by condensation of the top fraction by means of indirect heat exchange 13 against expanded sump liquid from the pressure column 2 of the air separator 1.
  • the resulting steam is discharged via line 16 and introduced into the low-pressure column 3 at a suitable point.
  • the crude argon column 5 does not require a top condenser. Your need for return liquid 7 is covered by sump liquid 12, which is obtained in the semi-pure column 9. As a rule, a pump 17 must be used to overcome the height difference in line 7.
  • the rectification areas shown throughout in the drawing consist in reality of several sections. Ordered packings are preferably used as mass transfer elements, especially in crude argon and semi-pure columns. However, parts of the columns can also be equipped with conventional rectification trays.
  • the crude argon column has one rectification section, the semi-pure column three.
  • the number of these sections can, however vary, in the crude argon column from one to about three, in the semi-pure column from about two to six.
  • the crude argon column 5 contains, for example, 30 to 120, preferably about 60 to 90 theoretical plates.
  • the number of theoretical plates in the semi-pure column 9 is, for example, 60 to 150, preferably approximately 90 to 120.
  • the ratio of the theoretical plate numbers (crude argon column 5 to semi-pure column 9) is, for example, 0.5.
  • the oxygen concentrations in the different streams have, for example, the following values: Transitional fraction 4 82 to 92, preferably about 86 to 90% Raw argon fraction 6 0.1 to 2.0, preferably about 0.5 to 1.0% Argon fraction 10 0.01 to 10, preferably about 0.01 to 0.1 ppm

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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)
EP94107374A 1993-05-28 1994-05-11 Procédé et dispositif d'obtention d'argon Expired - Lifetime EP0628777B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4317916A DE4317916A1 (de) 1993-05-28 1993-05-28 Verfahren und Vorrichtung zur Gewinnung von Argon
DE4317916 1993-05-28

Publications (2)

Publication Number Publication Date
EP0628777A1 true EP0628777A1 (fr) 1994-12-14
EP0628777B1 EP0628777B1 (fr) 1998-11-04

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EP94107374A Expired - Lifetime EP0628777B1 (fr) 1993-05-28 1994-05-11 Procédé et dispositif d'obtention d'argon

Country Status (4)

Country Link
US (1) US5426946A (fr)
EP (1) EP0628777B1 (fr)
DE (2) DE4317916A1 (fr)
ES (1) ES2125370T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543953C1 (de) * 1995-11-25 1996-12-19 Linde Ag Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck
EP0752565A2 (fr) * 1995-07-06 1997-01-08 The BOC Group plc Production d'argon
EP0870524A1 (fr) * 1997-04-11 1998-10-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Installation de séparation d'un mélange gazeux par distillation
DE19651280C1 (de) * 1996-10-02 1999-05-12 Linde Ag Verfahren und Vorrichtung zur Gewinnung von reinem Argon
US6205815B1 (en) 1997-04-11 2001-03-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plant for separation of a gas mixture by distillation
US6612129B2 (en) 2001-10-31 2003-09-02 Linde Aktiengesellschaft Process and apparatus for producing krypton and/or xenon by low-temperature fractionation of air

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Publication number Priority date Publication date Assignee Title
CA2142317A1 (fr) * 1994-02-24 1995-08-25 Anton Moll Methode et appareil pour la recuperation d'argon pur
DE4443190A1 (de) * 1994-12-05 1996-06-13 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
US5557951A (en) * 1995-03-24 1996-09-24 Praxair Technology, Inc. Process and apparatus for recovery and purification of argon from a cryogenic air separation unit
FR2739438B1 (fr) * 1995-09-29 1997-10-24 Air Liquide Procede et installation de production d'argon par distillation cryogenique
GB9605171D0 (en) * 1996-03-12 1996-05-15 Boc Group Plc Air separation
US5682767A (en) * 1996-11-18 1997-11-04 Air Liquide Process And Construction Argon production
US5682765A (en) * 1996-12-12 1997-11-04 Praxair Technology, Inc. Cryogenic rectification system for producing argon and lower purity oxygen
AU743283B2 (en) * 1998-04-21 2002-01-24 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and installation for air distillation with production of argon
DE19921949A1 (de) * 1999-05-12 2000-11-16 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
US6321567B1 (en) 2000-10-06 2001-11-27 Praxair Technology, Inc. Structured packing system for reduced distillation column height
EP2026024A1 (fr) 2007-07-30 2009-02-18 Linde Aktiengesellschaft Procédé et dispositif pour la production d'argon par séparation cryogénique d'air
DE102007035619A1 (de) 2007-07-30 2009-02-05 Linde Ag Verfahren und Vorrichtung zur Gewinnung von Argon durch Tieftemperaturzerlegung von Luft
DE102009016043A1 (de) 2009-04-02 2010-10-07 Linde Ag Verfahren zum Betreiben einer Reinargonsäule und Vorrichtung zur Reinargongewinnung
EP2447653A1 (fr) 2010-11-02 2012-05-02 Linde Aktiengesellschaft Procédé de séparation cryogénique de l'air à l'aide d'un condensateur latéral
DE102012006484A1 (de) 2012-03-29 2013-10-02 Linde Aktiengesellschaft Transportables Paket mit einer Coldbox und Verfahren zum Herstellen einer Tieftemperatur-Luftzerlegungsanlage
DE102012006479A1 (de) 2012-03-29 2013-10-02 Linde Ag Transportables Paket mit einer Coldbox und Verfahren zum Herstellen einer Tieftemperatur-Luftzerlegungsanlage
EP2645031A1 (fr) 2012-03-29 2013-10-02 Linde Aktiengesellschaft Colonne de séparation pour une installation de décomposition de l'air à basse température, installation de décomposition de l'air à basse température et procédé de décomposition à basse température de l'air
DE102012008415A1 (de) 2012-04-27 2013-10-31 Linde Aktiengesellschaft Transportables Paket mit einer Coldbox, Tieftemperatur-Luftzerlegungsanlage und Verfahren zum Herstellen einer Tieftemperatur-Luftzerlegungsanlage
BR112015020093A2 (pt) 2013-03-06 2017-07-18 Linde Ag instalação para a decomposição de ar, método para obtenção de um produto contendo argônio e método para construir uma instalação para composição de ar
DE102013018664A1 (de) 2013-10-25 2015-04-30 Linde Aktiengesellschaft Verfahren zur Tieftemperaturzerlegung von Luft und Tieftemperatur-Luftzerlegungsanlage
EP3040665A1 (fr) 2014-12-30 2016-07-06 Linde Aktiengesellschaft Système de colonne de distillation et installation pour la production d'oxygène par séparation cryogénique de l'air
EP3048401A1 (fr) 2015-01-20 2016-07-27 Linde Aktiengesellschaft Procédé et dispositif destinés à l'extraction variable d'argon par la séparation cryogénique de l'air
CN209524679U (zh) * 2018-10-29 2019-10-22 乔治洛德方法研究和开发液化空气有限公司 通过低温蒸馏来蒸馏空气的设备

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EP0377117A1 (fr) * 1988-12-01 1990-07-11 Linde Aktiengesellschaft Procédé et dispositif de séparation de l'air

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GB2107597B (en) * 1981-10-01 1985-02-27 Lummus Co Process and apparatus for fractionating close-boiling components of a multi-component system
US4836836A (en) * 1987-12-14 1989-06-06 Air Products And Chemicals, Inc. Separating argon/oxygen mixtures using a structured packing
DE3806523A1 (de) * 1988-03-01 1989-09-14 Linde Ag Verfahren zur reinigung von rohargon
US4983194A (en) * 1990-02-02 1991-01-08 Air Products And Chemicals, Inc. Production of high purity argon
US5076823A (en) * 1990-03-20 1991-12-31 Air Products And Chemicals, Inc. Process for cryogenic air separation
US5159816A (en) * 1991-05-14 1992-11-03 Air Products And Chemicals, Inc. Method of purifying argon through cryogenic adsorption
US5161380A (en) * 1991-08-12 1992-11-10 Union Carbide Industrial Gases Technology Corporation Cryogenic rectification system for enhanced argon production
US5207066A (en) * 1991-10-22 1993-05-04 Bova Vitaly I Method of air separation
US5237823A (en) * 1992-03-31 1993-08-24 Praxair Technology, Inc. Cryogenic air separation using random packing
US5282365A (en) * 1992-11-17 1994-02-01 Praxair Technology, Inc. Packed column distillation system

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Publication number Priority date Publication date Assignee Title
EP0377117A1 (fr) * 1988-12-01 1990-07-11 Linde Aktiengesellschaft Procédé et dispositif de séparation de l'air

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0752565A2 (fr) * 1995-07-06 1997-01-08 The BOC Group plc Production d'argon
EP0752565A3 (fr) * 1995-07-06 1998-01-28 The BOC Group plc Production d'argon
DE19543953C1 (de) * 1995-11-25 1996-12-19 Linde Ag Verfahren und Vorrichtung zur Gewinnung von Sauerstoff und Stickstoff unter überatmosphärischem Druck
EP0775881A2 (fr) 1995-11-25 1997-05-28 Linde Aktiengesellschaft Procédé et dispositif pour la récupération d'oxygène et d'azote à pression superatmosphérique
DE19651280C1 (de) * 1996-10-02 1999-05-12 Linde Ag Verfahren und Vorrichtung zur Gewinnung von reinem Argon
EP0870524A1 (fr) * 1997-04-11 1998-10-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Installation de séparation d'un mélange gazeux par distillation
FR2761897A1 (fr) * 1997-04-11 1998-10-16 Air Liquide Installation de separation d'un melange gazeux par distillation
US6205815B1 (en) 1997-04-11 2001-03-27 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plant for separation of a gas mixture by distillation
US6272883B2 (en) 1997-04-11 2001-08-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plant for separation of a gas mixture by distillation
US6612129B2 (en) 2001-10-31 2003-09-02 Linde Aktiengesellschaft Process and apparatus for producing krypton and/or xenon by low-temperature fractionation of air

Also Published As

Publication number Publication date
ES2125370T3 (es) 1999-03-01
DE4317916A1 (de) 1994-12-01
DE59407206D1 (de) 1998-12-10
EP0628777B1 (fr) 1998-11-04
US5426946A (en) 1995-06-27

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