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US20080271481A1 - Air Separating Device by Means of Cryogenic Distillation - Google Patents

Air Separating Device by Means of Cryogenic Distillation Download PDF

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Publication number
US20080271481A1
US20080271481A1 US12/097,641 US9764106A US2008271481A1 US 20080271481 A1 US20080271481 A1 US 20080271481A1 US 9764106 A US9764106 A US 9764106A US 2008271481 A1 US2008271481 A1 US 2008271481A1
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US
United States
Prior art keywords
line
section
exchange
air
column
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.)
Abandoned
Application number
US12/097,641
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English (en)
Inventor
Benoit Davidian
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Assigned to L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE reassignment L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DAVIDIAN, BENOIT
Publication of US20080271481A1 publication Critical patent/US20080271481A1/en
Abandoned 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
    • F25J3/04624—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 integrated mass and heat exchange, so-called non-adiabatic rectification, e.g. dephlegmator, reflux exchanger
    • 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
    • F25J3/04254—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using the cold stored in external cryogenic fluids
    • 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
    • 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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • 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
    • F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
    • F25J5/002—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
    • F25J5/007—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger combined with mass exchange, i.e. in a so-called dephlegmator
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • 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
    • F25J2290/44—Particular materials used, e.g. copper, steel or alloys thereof or surface treatments used, e.g. enhanced surface

Definitions

  • the present invention relates to an apparatus for separating air by cryogenic distillations in particular for producing nitrogen.
  • a nitrogen generator described in U.S. Pat. No. 5,899,093 comprises an exchange line in which the air to be distilled is cooled, a distillation column in which the air is separated into a nitrogen-rich stream at the top of the column and an oxygen-enriched stream at the bottom of the column.
  • a vaporizer-condenser To supply reflux, part of the nitrogen-rich stream is sent to a vaporizer-condenser where it is condensed by heat exchange with the oxygen-enriched stream.
  • the nitrogen may be condensed in a deflegmator.
  • the enriched liquid partially vaporized in the deflegmator is sent to a phase separator and the liquid formed in the separator again flows to the deflegmator. It is an object of the present invention to eliminate the condenser-vaporizer, which imposes various constraints:
  • an apparatus for separating air by cryogenic distillation for producing nitrogen comprising:
  • the exchange line comprises two sections, a deflegmation section and a heat exchange section; the deflegmation section is connected to the column and to the oxygen-enriched liquid line and the heat exchange section is connected to the air supply line and to the deflegmation section.
  • it provides a method for separating air by cryogenic distillation for producing nitrogen in an apparatus comprising an exchange line and a simple distillation column containing plates and/or structured packings, in which compressed and purified air is sent to the exchange line, compressed, purified and cooled air is sent from the exchange line to the distillation column, a stream of oxygen-enriched liquid is withdrawn from the column and sent to the exchange line,
  • the exchange line comprises two sections, a deflegmation section and a heat exchange section; the deflegmation section is connected to the column and to the oxygen-enriched liquid line and the heat exchange section is connected to the air supply line and to the deflegmation section, and in that the oxygen-enriched liquid is vaporized completely in the heat exchange section to produce an oxygen-enriched gas.
  • the invention proposes to incorporate the “vaporization-condensation” function in the main heat exchanger by using the coldest part of the heat exchanger as a deflegmator in order to condense the nitrogen therein.
  • the cold box is higher, but much narrower because the heat exchanger is above the column, thereby procuring a considerable gain.
  • FIGURE shows an air separation apparatus according to the invention.
  • a stream of compressed air is purified in a purification unit (not shown) and sent to the hot end of an exchange line 3 .
  • the exchange line comprises a conventional heat exchange section 3 A and a deflegmation section 3 B.
  • the two sections are contiguous and the exchange line is a plate and brazed fin-tube heat exchanger.
  • the air 1 is cooled in the exchange line up to the cold end of the section 3 A and then exits the exchange line to be sent to the bottom of a simple distillation column 7 .
  • the column 7 contains structured packings or plates 9 .
  • the air is separated into an oxygen-enriched stream 11 and a nitrogen-enriched stream.
  • the oxygen-enriched stream 11 is withdrawn in liquid form from the column 7 and sent to the cold end of the section 3 B.
  • the nitrogen-enriched stream leaves the top of the column directly via the passages of the section 3 B.
  • the exchange line 3 has the same width as the top of the column 7 and is welded to the shell of the column (by a round-square or a round-rectangular adaptor).
  • the cooling capacity required for distillation is supplied by injection feeding of liquid nitrogen 13 , obtained from a storage unit in a manner known per se described in EP-A-0452177.
  • an air turbine 1 or a vaporized enriched liquid turbine may be provided.
  • the section 3 B comprises two nitrogen passages for one passage of enriched liquid.
  • the enriched liquid is completely vaporized in the section 3 B of the exchange line 3 so that it is completely converted to gas.
  • the nitrogen is partly condensed: the condensed part falls by gravity into the column to serve as reflux, the exchange line 3 being installed above the column (by direct welding or optionally via appropriate piping). The remainder of the nitrogen gas continues to rise through the entire exchange line 3 .
  • the section 3 A of the exchange line comprises the conventional main exchange line.
  • the nitrogen gas and vaporized enriched liquid are heated by the incoming air 1 .
  • the double nitrogen passages of the deflegmation section 3 B may be reallocated between the nitrogen to be heated and the air to be cooled in the section 3 A, This can be carried out by fluid inlet/outlet (distribution box), or, preferably, by internal redistribution (use of rods and perforated separating plates).
  • the exchange line 3 is preferably made from copper or aluminum and the column 7 is made from stainless steel. If the exchange line is made from aluminum and the column is made from stainless steel, one or more composite junctions must be provided between the two. If not, the exchange line 3 and the column 7 may be made from aluminum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US12/097,641 2005-12-20 2006-12-15 Air Separating Device by Means of Cryogenic Distillation Abandoned US20080271481A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0553971 2005-12-20
FR0553971A FR2895069B1 (fr) 2005-12-20 2005-12-20 Appareil de separation d'air par distillation cryogenique
PCT/FR2006/051366 WO2007074276A2 (fr) 2005-12-20 2006-12-15 Appareil de separation d'air par distillation cryogenique

Publications (1)

Publication Number Publication Date
US20080271481A1 true US20080271481A1 (en) 2008-11-06

Family

ID=36660838

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/097,641 Abandoned US20080271481A1 (en) 2005-12-20 2006-12-15 Air Separating Device by Means of Cryogenic Distillation

Country Status (9)

Country Link
US (1) US20080271481A1 (fr)
EP (1) EP1966554B1 (fr)
JP (1) JP5074416B2 (fr)
CN (1) CN101341370B (fr)
DK (1) DK1966554T3 (fr)
ES (1) ES2689041T3 (fr)
FR (1) FR2895069B1 (fr)
PL (1) PL1966554T3 (fr)
WO (1) WO2007074276A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026025A1 (fr) * 2007-07-30 2009-02-18 Linde Aktiengesellschaft Procédé et dispositif de production d'azote sous haute pression par séparation cryogénique d'air dans une colonne simple
FR2929384A1 (fr) * 2008-03-27 2009-10-02 Air Liquide Appareil de separation d'air comprenant une simple colonne de distillation
WO2009063146A1 (fr) * 2008-03-28 2009-05-22 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Echangeur de chaleur et appareil de séparation d'air par distillation cryogénique incorporant un tel échangeur
FR2973486B1 (fr) * 2011-03-31 2013-05-03 Air Liquide Procede de separation d'air par distillation cryogenique
EP3914870A4 (fr) * 2019-01-25 2022-09-07 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Processus et appareil pour fournir un gaz de secours sous pression

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5144809A (en) * 1990-08-07 1992-09-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for production of nitrogen
US5899093A (en) * 1998-05-22 1999-05-04 Air Liquide Process And Construction, Inc. Process and apparatus for the production of nitrogen by cryogenic distillation
US6079223A (en) * 1999-05-04 2000-06-27 Praxair Technology, Inc. Cryogenic air separation system for producing moderate purity oxygen and moderate purity nitrogen
US6237366B1 (en) * 2000-04-14 2001-05-29 Praxair Technology, Inc. Cryogenic air separation system using an integrated core
US6351969B1 (en) * 2001-01-31 2002-03-05 Praxair Technology, Inc. Cryogenic nitrogen production system using a single brazement
US6907751B2 (en) * 2002-07-30 2005-06-21 Air Products And Chemicals, Inc. Liquid distributor

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GB1472402A (en) * 1973-07-18 1977-05-04 Cryoplants Ltd Air separation
JP2716762B2 (ja) * 1988-12-12 1998-02-18 大同ほくさん株式会社 高純度窒素ガス製造装置
FR2660741A1 (fr) 1990-04-10 1991-10-11 Air Liquide Procede et installation de production d'azote gazeux, et systeme de fourniture d'azote correspondant.
FR2675568B1 (fr) * 1991-04-19 1993-07-16 Air Liquide Procede de separation cryogenique de melanges contenant de l'oxygene et garnissages organises pour la mise en óoeuvre de ce procede.
FR2690231B1 (fr) * 1992-04-17 1994-06-03 Air Liquide Echangeur de chaleur a ruissellement et installation de distillation d'air comportant un tel echangeur.
US5275004A (en) * 1992-07-21 1994-01-04 Air Products And Chemicals, Inc. Consolidated heat exchanger air separation process
US5410885A (en) * 1993-08-09 1995-05-02 Smolarek; James Cryogenic rectification system for lower pressure operation
JP3957842B2 (ja) * 1997-11-25 2007-08-15 大陽日酸株式会社 窒素製造方法及び装置
US6125656A (en) * 1999-11-03 2000-10-03 Praxair Technology, Inc. Cryogenic rectification method for producing nitrogen gas and liquid nitrogen
US6295836B1 (en) * 2000-04-14 2001-10-02 Praxair Technology, Inc. Cryogenic air separation system with integrated mass and heat transfer
JP4520667B2 (ja) * 2001-07-17 2010-08-11 大陽日酸株式会社 空気分離方法および装置
EP1300640A1 (fr) * 2001-10-04 2003-04-09 Linde Aktiengesellschaft Procédé et dispositif de production d'azote ultra-pur par séparation cryogénique d'air
JP4230213B2 (ja) * 2002-12-24 2009-02-25 大陽日酸株式会社 空気液化分離装置及び方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5144809A (en) * 1990-08-07 1992-09-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for production of nitrogen
US5899093A (en) * 1998-05-22 1999-05-04 Air Liquide Process And Construction, Inc. Process and apparatus for the production of nitrogen by cryogenic distillation
US6079223A (en) * 1999-05-04 2000-06-27 Praxair Technology, Inc. Cryogenic air separation system for producing moderate purity oxygen and moderate purity nitrogen
US6237366B1 (en) * 2000-04-14 2001-05-29 Praxair Technology, Inc. Cryogenic air separation system using an integrated core
US6351969B1 (en) * 2001-01-31 2002-03-05 Praxair Technology, Inc. Cryogenic nitrogen production system using a single brazement
US6907751B2 (en) * 2002-07-30 2005-06-21 Air Products And Chemicals, Inc. Liquid distributor

Also Published As

Publication number Publication date
FR2895069A1 (fr) 2007-06-22
PL1966554T3 (pl) 2018-11-30
EP1966554A2 (fr) 2008-09-10
FR2895069B1 (fr) 2014-01-31
DK1966554T3 (en) 2018-10-15
CN101341370A (zh) 2009-01-07
CN101341370B (zh) 2011-09-14
WO2007074276A2 (fr) 2007-07-05
ES2689041T3 (es) 2018-11-08
WO2007074276A3 (fr) 2007-09-13
JP5074416B2 (ja) 2012-11-14
JP2009520176A (ja) 2009-05-21
EP1966554B1 (fr) 2018-08-15

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AS Assignment

Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DAVIDIAN, BENOIT;REEL/FRAME:021100/0949

Effective date: 20080415

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION