EP1612496A4 - Air separator - Google Patents

Air separator

Info

Publication number
EP1612496A4
EP1612496A4 EP04723340A EP04723340A EP1612496A4 EP 1612496 A4 EP1612496 A4 EP 1612496A4 EP 04723340 A EP04723340 A EP 04723340A EP 04723340 A EP04723340 A EP 04723340A EP 1612496 A4 EP1612496 A4 EP 1612496A4
Authority
EP
European Patent Office
Prior art keywords
air separator
separator
air
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
EP04723340A
Other languages
German (de)
French (fr)
Other versions
EP1612496A1 (en
EP1612496B1 (en
Inventor
Hiroshi Aoki
Akira Yoshino
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.)
Air Water Inc
Original Assignee
Air Water Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=33100392&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1612496(A4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Air Water Inc filed Critical Air Water Inc
Publication of EP1612496A1 publication Critical patent/EP1612496A1/en
Publication of EP1612496A4 publication Critical patent/EP1612496A4/en
Application granted granted Critical
Publication of EP1612496B1 publication Critical patent/EP1612496B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • 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
    • F25J3/04163—Hot end purification of the feed air
    • F25J3/04169—Hot end purification of the feed air by adsorption of the 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
    • 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04036—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of oxygen
    • 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04109—Arrangements of compressors and /or their drivers
    • F25J3/04145—Mechanically coupling of different compressors of the air fractionation process to the same driver(s)
    • 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
    • F25J3/04309—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 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
    • 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
    • F25J3/04636—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 hybrid air separation unit, e.g. combined process by cryogenic separation and non-cryogenic separation techniques
    • 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
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—Oxygen

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Drying Of Gases (AREA)
EP04723340.8A 2003-03-26 2004-03-25 Air separator Revoked EP1612496B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003086052 2003-03-26
JP2004002877A JP4782380B2 (en) 2003-03-26 2004-01-08 Air separation device
PCT/JP2004/004145 WO2004085941A1 (en) 2003-03-26 2004-03-25 Air separator

Publications (3)

Publication Number Publication Date
EP1612496A1 EP1612496A1 (en) 2006-01-04
EP1612496A4 true EP1612496A4 (en) 2012-08-29
EP1612496B1 EP1612496B1 (en) 2016-12-07

Family

ID=33100392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04723340.8A Revoked EP1612496B1 (en) 2003-03-26 2004-03-25 Air separator

Country Status (7)

Country Link
US (1) US20060272352A1 (en)
EP (1) EP1612496B1 (en)
JP (1) JP4782380B2 (en)
KR (1) KR101099855B1 (en)
CN (1) CN100390481C (en)
BR (1) BRPI0408715A (en)
WO (1) WO2004085941A1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5005894B2 (en) 2005-06-23 2012-08-22 エア・ウォーター株式会社 Nitrogen generation method and apparatus used therefor
FR2911391A1 (en) * 2007-01-16 2008-07-18 Air Liquide Cryogenic separation method for gas, involves using distillation columns and absorption column with heat and/or material exchange section between descending liquid and mounting gas, where section has specific parameter
KR100930316B1 (en) * 2008-05-16 2009-12-08 대성산업가스 주식회사 Ultra-small liquid nitrogen and liquid oxygen production device
JP2013212474A (en) * 2012-04-03 2013-10-17 Jfe Engineering Corp Gas separation apparatus
JP5529211B2 (en) * 2012-06-19 2014-06-25 東京瓦斯株式会社 Gas separator
KR101644245B1 (en) * 2014-11-13 2016-08-11 참좋은우리 주식회사 Ozone cream is manufactured by the manufacturing apparatus with a humidity adjusting device
KR101644244B1 (en) * 2014-11-13 2016-08-11 참좋은우리 주식회사 Manufacturing methods take advantage of Ozone cream manufacturing equipment with humidity-conditioned
CN104534812B (en) * 2015-01-04 2016-10-19 中煤能源黑龙江煤化工有限公司 One is applied to gas cryogenic separation equipment main distillation column
KR101683839B1 (en) * 2015-05-21 2016-12-08 참좋은우리 주식회사 Ozone cream high-speed manufacturing equipment
CN104833174B (en) * 2015-05-26 2017-08-11 杭州杭氧股份有限公司 A kind of auxiliary oxygen column low energy consumption with pressure produces the device and method of low purity oxygen with pressure and high pure oxygen product
US10895417B2 (en) * 2016-03-25 2021-01-19 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for the production of air gases by the cryogenic separation of air with improved front end purification and air compression
JP6575499B2 (en) * 2016-12-15 2019-09-18 Ｊｆｅスチール株式会社 Oxygen supply apparatus and method in iron making process
KR102092716B1 (en) * 2017-12-07 2020-03-24 주식회사 포스코 Air separation plant
KR102259807B1 (en) 2019-07-02 2021-06-03 주식회사 포스코 Adsorption device and air separation plant having the same
CN114558416A (en) * 2022-01-24 2022-05-31 湖南泰瑞医疗科技有限公司 Integrated energy-saving oxygen generation system
WO2024010756A1 (en) * 2022-07-08 2024-01-11 Entegris, Inc. Methods and equipment for cryogenic removal of impurities from oxygen gas
CN115451655B (en) * 2022-09-29 2023-04-28 北京飞燕石化环保科技发展有限公司 Air separation device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1457882A (en) * 1972-01-07 1976-12-08 Boc International Ltd Air separation
EP0232426A1 (en) * 1985-08-12 1987-08-19 Daidousanso Co., Ltd. Oxygen gas production unit
JPH01174878A (en) * 1987-12-28 1989-07-11 Nippon Sanso Kk Manufacture of low purity oxygen
US5701763A (en) * 1997-01-07 1997-12-30 Praxair Technology, Inc. Cryogenic hybrid system for producing low purity oxygen and high purity nitrogen
US6192707B1 (en) * 1999-11-12 2001-02-27 Praxair Technology, Inc. Cryogenic system for producing enriched air

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2699047A (en) * 1950-10-27 1955-01-11 Linde Eismasch Ag Process for cooling and purifying compressed gas mixtures
JPS5326276A (en) * 1976-08-25 1978-03-10 Hitachi Ltd Liquefying separation method of air
JPS5355491A (en) * 1976-10-29 1978-05-19 Matsushita Electric Ind Co Ltd Nitrogen oxides removing agent
GB2080929B (en) * 1980-07-22 1984-02-08 Air Prod & Chem Producing gaseous oxygen
JPS6124970A (en) * 1984-07-13 1986-02-03 大同酸素株式会社 Production unit for high-purity oxygen gas
DE4109945A1 (en) * 1991-03-26 1992-10-01 Linde Ag METHOD FOR DEEP TEMPERATURE DISPOSAL OF AIR
JP3345508B2 (en) * 1994-03-31 2002-11-18 住友精密工業株式会社 Suction device
JPH08291967A (en) * 1995-04-20 1996-11-05 Daido Hoxan Inc Method and apparatus for separating the air
FR2774308B1 (en) * 1998-02-05 2000-03-03 Air Liquide COMBINED PROCESS AND PLANT FOR PRODUCING COMPRESSED AIR AND AT LEAST ONE AIR GAS
JP4150102B2 (en) * 1998-05-20 2008-09-17 大陽日酸株式会社 Air liquefaction separation method and apparatus
FR2799987B1 (en) * 1999-10-25 2002-04-26 Air Liquide PROCESS FOR PURIFYING A GAS BY ADSORPTION OF TWO IMPURITIES AND CORRESPONDING DEVICE

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1457882A (en) * 1972-01-07 1976-12-08 Boc International Ltd Air separation
EP0232426A1 (en) * 1985-08-12 1987-08-19 Daidousanso Co., Ltd. Oxygen gas production unit
JPH01174878A (en) * 1987-12-28 1989-07-11 Nippon Sanso Kk Manufacture of low purity oxygen
US5701763A (en) * 1997-01-07 1997-12-30 Praxair Technology, Inc. Cryogenic hybrid system for producing low purity oxygen and high purity nitrogen
US6192707B1 (en) * 1999-11-12 2001-02-27 Praxair Technology, Inc. Cryogenic system for producing enriched air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004085941A1 *

Also Published As

Publication number Publication date
US20060272352A1 (en) 2006-12-07
CN100390481C (en) 2008-05-28
JP4782380B2 (en) 2011-09-28
KR20060024352A (en) 2006-03-16
CN1764813A (en) 2006-04-26
EP1612496A1 (en) 2006-01-04
WO2004085941A1 (en) 2004-10-07
KR101099855B1 (en) 2011-12-28
BRPI0408715A (en) 2006-03-07
JP2004309119A (en) 2004-11-04
EP1612496B1 (en) 2016-12-07

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