EP0689019A1 - Verfahren und Einrichtung zur Herstellung von gasförmigen Drucksäuerstoff - Google Patents

Verfahren und Einrichtung zur Herstellung von gasförmigen Drucksäuerstoff Download PDF

Info

Publication number
EP0689019A1
EP0689019A1 EP95401443A EP95401443A EP0689019A1 EP 0689019 A1 EP0689019 A1 EP 0689019A1 EP 95401443 A EP95401443 A EP 95401443A EP 95401443 A EP95401443 A EP 95401443A EP 0689019 A1 EP0689019 A1 EP 0689019A1
Authority
EP
European Patent Office
Prior art keywords
air
pressure
column
heat exchange
fraction
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
EP95401443A
Other languages
English (en)
French (fr)
Other versions
EP0689019B1 (de
Inventor
Maurice Grenier
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
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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=9464405&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0689019(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0689019A1 publication Critical patent/EP0689019A1/de
Application granted granted Critical
Publication of EP0689019B1 publication Critical patent/EP0689019B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

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
    • F25J3/04006—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
    • F25J3/04024—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 purified feed air, so-called boosted 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
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of 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
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/04084—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression 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
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—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
    • F25J3/04284—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
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low 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
    • F25J3/04375—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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/90—Details relating to column internals, e.g. structured packing, gas or liquid distribution
    • F25J2200/94—Details relating to the withdrawal point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
    • F25J2215/52—Oxygen production with multiple purity O2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
    • F25J2215/54—Oxygen production with multiple pressure O2
    • 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
    • F25J2290/62—Details of storing a fluid in a tank
    • 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
    • Y10S62/912—External refrigeration system
    • Y10S62/913—Liquified gas

Definitions

  • the present invention relates to a process for producing gaseous oxygen under pressure of the type in which: air is distilled in a double distillation column installation which comprises a medium pressure column operating under a pressure known as medium pressure, a low pressure column operating under a so-called low pressure, and a heat exchange line for putting the air to be distilled in heat exchange relation with the products withdrawn from the double column; liquid oxygen is drawn from the low pressure column; this liquid oxygen is brought to an oxygen vaporization pressure of at least about 13 bars, and it is vaporized and it is heated under this vaporization pressure, by heat exchange with air to be distilled during cooling .
  • the pressures indicated are absolute pressures.
  • the expression “condensation” and “vaporization” is intended to mean either a condensation or a vaporization proper, or a pseudo-condensation or a pseudo-vaporization, depending on whether the pressures are subcritical or supercritical.
  • the invention aims to provide a method. "pump" offering great freedom of regulation of operating parameters and particularly well suited, from the point of view of specific energy consumption as well as liquid production, to large installations, ie producing at least 700 tonnes of oxygen per day.
  • the installation may in particular comprise a single air compressor with n stages, said first compression means being constituted by a certain number p of stages, with p ⁇ n , and said second compression means being constituted by the whole of the compressor.
  • the air distillation installation shown in Figure 1 essentially comprises: an air compressor 1; an apparatus 2 for purifying the compressed air into water and CO2 by adsorption, this apparatus comprising two adsorption bottles 2A, 2B, one of which operates in adsorption while the other is being regenerated; a turbine-blower assembly 3 comprising an expansion turbine 4 and a blower or blower 5 whose shafts are coupled, the blower being optionally equipped with a refrigerant (not shown); a heat exchanger 6 constituting the heat exchange line of the installation; a double distillation column 7 comprising a medium pressure column 8 surmounted by a low pressure column 9, with a vaporizer-condenser 10 putting the overhead vapor (nitrogen) from column 8 in heat exchange relation with the tank liquid (oxygen) from column 9; a liquid oxygen tank 11, the bottom of which is connected to a liquid oxygen pump 12; and a liquid nitrogen tank 13, the bottom of which is connected to a liquid nitrogen pump 14.
  • This installation is mainly intended to supply, via a pipe 15, gaseous oxygen under a predetermined high pressure, which can be between approximately 13 bars and a few tens of bars. These are significant quantities of gaseous oxygen, at least equal to around 700 t / day and up to several thousand tonnes per day.
  • liquid oxygen withdrawn from the tank of the column 9 via a pipe 16 is stored in the reservoir 11.
  • a flow of oxygen, withdrawn from this reservoir, is brought to high pressure by the pump 12 in the liquid state, then vaporized and heated under this high pressure in passages 17 of the exchanger 6.
  • the heat necessary for this vaporization and this reheating, as well as for the reheating and possibly for the vaporization of other fluids drawn from the double column, is supplied by the air to be distilled, under the following conditions.
  • Compressor 1 is a multi-stage compressor, with n stages. All of the incoming atmospheric air is compressed by the first p stages at medium pressure, which is the operating pressure of column 8, then is precooled in 18 and cooled to around ambient temperature in 19, is purified in one, 2A for example, adsorption bottles, and divided into two fractions.
  • the first fraction at medium pressure, representing for example approximately 40% of the flow of treated air, is cooled, from the hot end to the frcid end of the heat exchange line 6, in passages 20 thereof, up to '' in the vicinity of its dew point, then is directly introduced into the tank of column 8.
  • the rest of the purified air in 2A is returned to the inlet of the ( p + 1) th stage of compressor 1 and is compressed by the following stages up to a first high air pressure, significantly higher than the average pressure of column 8, in practice greater than 9 bars.
  • the compressed air, precooled in 19A, is again divided into two streams.
  • the first flow representing at least 45% of the flow of treated air, is boosted at a second high pressure by the booster 5, which is driven by the turbine 4.
  • This second high air pressure is between approximately 25 bars and the condensation pressure of air by vaporization of oxygen under the high oxygen pressure.
  • the first air flow is then introduced at the hot end of the exchanger 6 and completely cooled to an intermediate temperature. At this temperature, a fraction of the air continues to cool and is liquefied in passages 20A of the exchanger, then it is partly relieved at low pressure in an expansion valve 21 and partly at medium pressure in a valve expansion valve 21A and introduced respectively at an intermediate level in column 9 and in the lower part of column 8. The rest of the air is expanded at medium pressure in the turbine 4 then sent directly, via a line 22, to the base of column 8.
  • the second flow is introduced under the first high pressure into the exchange line 6, cooled and liquefied until the cold end thereof in passages 20B, expanded in an expansion valve 21B and combined with the current from the valve trigger 21A.
  • the low-pressure nitrogen is heated in passages 28 of the exchanger 6 and then recovered via a pipe 29, while the residual gas, after reheating in passages 30 of the exchanger, is used to regenerate an adsorption bottle, the bottle 2B in the example considered, before being evacuated via a pipe 31.
  • part of the medium pressure liquid nitrogen is, after expansion in an expansion valve 32, stored in the reservoir 13, and that a production of liquid nitrogen and / or oxygen liquid is supplied via a line 33 (for nitrogen) and / or 34 (for oxygen)
  • the installation produces, in addition to low-pressure nitrogen gas coming directly from the head of column 9 and the high pressure gaseous oxygen, pressurized nitrogen gas, obtained by vaporization in the heat exchange line of a flow of liquid nitrogen taken from line 33 via a line 35.
  • This nitrogen vaporization can in particular perform by condensing the air contained in passages 20A or 20B.
  • the installation shown in Figure 2 is intended to produce gaseous oxygen under high pressure, for example of the order of 40 bars. It essentially comprises two air compressors 41 and 42, an apparatus 43 for purification by adsorption, a double distillation column 44 consisting of a medium pressure column 45, operating at about 6 bars, surmounted by a low pressure column 46 , operating under a pressure slightly greater than 1 bar, a heat exchange line 47, a sub-cooler 48, a liquid oxygen pump 49, a cold blower 50, a first turbine 51 whose wheel is mounted on the same shaft than that of the cold fan, and a second turbine 52 braked by an appropriate brake 53 such as an alternator.
  • the pump 49 sucks the liquid oxygen under about 1 bar in the tank of the column 46, brings it to the desired production pressure and introduces it into the vaporization-oxygen heating passages 61 of the exchange line.
  • the air to be distilled, compressed at medium pressure by the compressor 41 and purified of water and CO2 in 43, is divided into two streams.
  • the first flow is directly cooled in passages 62 of the exchange line 47.
  • a fraction of this air has left the line d exchange, expanded at low pressure in the turbine 52, and blown at an intermediate point of the column 46 via a pipe 63.
  • the rest of the medium pressure air continues to cool until the cold end of the exchange line , where it is in the vicinity of its dew point, then is sent to the tank of column 45.
  • the rest of the air from the device 43 is compressed at a first high pressure, for example 16.5 bars, by the compressor 42, then enters the air cooling passages 64 of the exchange line. .
  • the rest of the air conveyed by the passages 67 continues to cool down to the cold end of the exchange line, being liquefied and then cooled. It is then expanded at medium pressure in an expansion valve 68 and sent a few trays above the tank of the column 45.
  • the air conveyed by the passages 64 and not exited via the pipe 65 is cooled to 'at the cold end of the exchange line, then relaxed to medium pressure in an expansion valve 69 and sent a few trays above the tank of the column 45.
  • the fan 50 which provides this compression is driven by the turbine 51, so that no external energy is required. Given the mechanical losses, the amount of cold produced by this turbine is slightly greater than the heat of compression, and the excess contributes to keeping the installation cold. The balance of the frigories necessary for this keeping cold is supplied by the turbine 52, or, alternatively, if the oxygen to be produced must have a high purity, by expansion of air or nitrogen at medium pressure in a turbine , in a classic way.
  • the installation can also produce oxygen at a pressure low enough to allow the vaporization of oxygen by condensing air at the highest process air pressure.
  • This oxygen pressure would for example be less than 8 bars.
  • a double pump 70 has been indicated in broken lines in FIG. 2 compressing liquid oxygen of reduced purity at an intermediate pressure of less than 8 bars. This oxygen is vaporized by condensation of a corresponding part of the air supercharged by the blower 50, which only has to provide the heat to compensate for the excess of cold due to the vaporization of the high pressure oxygen.
  • a dashed pump 71 of medium pressure liquid nitrogen has been indicated in broken lines in FIG. 2 bringing this nitrogen, withdrawn from column 45, to an intermediate pressure sufficiently low to allow its vaporization by condensation of air at the highest pressure of the process, ie 23 bars.
  • FIG. 2 also shows a pipe 72 for producing liquid oxygen withdrawn from the tank of the column 46, as well as a pipe 72A for producing liquid nitrogen coming from the head of the column 45.
  • FIG. 3 The installation of FIG. 3 is a variant of that of FIG. 2.
  • a fraction of the air coming from the compressor 42 is boosted by a hot blower 73, cooled in 47 to the temperature T2, boosted again by the cold blower 50, reintroduced into the exchange line at a temperature T3 greater than T2, then treated in two different streams from the temperature T4, as previously.
  • the rest of the air from the compressor 42 is cooled in additional passages 74 of the exchange line 47 to a temperature T5 between temperatures T4 and T1, and, at this temperature, part of this air is out of the exchange line, expanded at medium pressure in an additional turbine 75 coupled to the blower 73, then sent to the bottom of the column 45.
  • the rest of the air conveyed by the passages 74 continues to cool until cold end of the exchange line, where it is liquefied and sub-cooled, then is expanded at medium pressure in an expansion valve 76 and sent to the lower part of the column 45.
  • the invention is particularly advantageous, from the energy point of view, when the oxygen vaporization pressure is greater than approximately 20 bars.
EP95401443A 1994-06-20 1995-06-19 Verfahren und Einrichtung zur Herstellung von gasförmigem Drucksauerstoff Revoked EP0689019B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407531 1994-06-20
FR9407531A FR2721383B1 (fr) 1994-06-20 1994-06-20 Procédé et installation de production d'oxygène gazeux sous pression.

Publications (2)

Publication Number Publication Date
EP0689019A1 true EP0689019A1 (de) 1995-12-27
EP0689019B1 EP0689019B1 (de) 1999-07-28

Family

ID=9464405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401443A Revoked EP0689019B1 (de) 1994-06-20 1995-06-19 Verfahren und Einrichtung zur Herstellung von gasförmigem Drucksauerstoff

Country Status (10)

Country Link
US (1) US5596885A (de)
EP (1) EP0689019B1 (de)
JP (1) JPH08175806A (de)
KR (1) KR960001706A (de)
CN (1) CN1081782C (de)
CA (1) CA2152010A1 (de)
DE (1) DE69511013T2 (de)
ES (1) ES2136259T3 (de)
FR (1) FR2721383B1 (de)
ZA (1) ZA955051B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0789208A1 (de) * 1996-02-12 1997-08-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren und Einrichtung zur Herstellung von gasförmigem Sauerstoff unter hohe Druck
EP1067345A1 (de) * 1999-07-05 2001-01-10 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
FR2943772A1 (fr) * 2009-03-27 2010-10-01 Air Liquide Appareil et procede de separation d'air par distillation cryogenique
FR3014545A1 (fr) * 2013-12-05 2015-06-12 Air Liquide Procede et appareil de separation d’air par distillation cryogenique
EP2176610A4 (de) * 2007-08-10 2018-03-21 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Verfahren und vorrichtung zur trennung von luft durch kryogene destillation

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776760B1 (fr) * 1998-03-31 2000-05-05 Air Liquide Procede et appareil de separation d'air par distillation cryogenique
US6082135A (en) * 1999-01-29 2000-07-04 The Boc Group, Inc. Air separation method and apparatus to produce an oxygen product
US6202442B1 (en) * 1999-04-05 2001-03-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'expoitation Des Procedes Georges Claude Integrated apparatus for generating power and/or oxygen enriched fluid and process for the operation thereof
FR2806152B1 (fr) * 2000-03-07 2002-08-30 Air Liquide Procede et installation de separation d'air par distillation cryogenique
EP1207362A1 (de) * 2000-10-23 2002-05-22 Air Products And Chemicals, Inc. Verfahren und Vorrichtung zur Herstellung von gasförmigem Niederdrucksauerstoff
DE10111428A1 (de) * 2001-03-09 2002-09-12 Linde Ag Verfahren und Vorrichtung zur Zerlegung eines Gasgemischs mit Notbetrieb
FR2854683B1 (fr) * 2003-05-05 2006-09-29 Air Liquide Procede et installation de production de gaz de l'air sous pression par distillation cryogenique d'air
FR2863348B1 (fr) * 2003-12-05 2006-12-22 Air Liquide Compresseur de gaz, appareil de separation d'un melange gazeux incorporant un tel compresseur et procede de separation d'un melange gazeux incorporant un tel compresseur
US6962062B2 (en) * 2003-12-10 2005-11-08 L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Proédés Georges Claude Process and apparatus for the separation of air by cryogenic distillation
EP1544559A1 (de) * 2003-12-20 2005-06-22 Linde AG Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
FR2865024B3 (fr) * 2004-01-12 2006-05-05 Air Liquide Procede et installation de separation d'air par distillation cryogenique
US7272954B2 (en) * 2004-07-14 2007-09-25 L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Proceded Georges Claude Low temperature air separation process for producing pressurized gaseous product
AU2005225027A1 (en) * 2005-07-21 2007-02-08 L'air Liquide Societe Anonyme Pour L'etude Et L"Exploitation Des Procedes Georges Claude Process and apparatus for the separation of air by cryogenic distillation
EP1767884A1 (de) * 2005-09-23 2007-03-28 L'Air Liquide Société Anon. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
US20070095100A1 (en) * 2005-11-03 2007-05-03 Rankin Peter J Cryogenic air separation process with excess turbine refrigeration
FR2895068B1 (fr) * 2005-12-15 2014-01-31 Air Liquide Procede de separation d'air par distillation cryogenique
US7533540B2 (en) * 2006-03-10 2009-05-19 Praxair Technology, Inc. Cryogenic air separation system for enhanced liquid production
FR2913760B1 (fr) * 2007-03-13 2013-08-16 Air Liquide Procede et appareil de production de gaz de l'air sous forme gazeuse et liquide a haute flexibilite par distillation cryogenique
EP1972875A1 (de) * 2007-03-23 2008-09-24 L'AIR LIQUIDE, S.A. pour l'étude et l'exploitation des procédés Georges Claude Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
US20090100864A1 (en) * 2007-07-06 2009-04-23 Den Held Paul Anton Process to compress air and its use in an air separation process and systems using said processes
US20100192628A1 (en) * 2009-01-30 2010-08-05 Richard John Jibb Apparatus and air separation plant
US8726691B2 (en) * 2009-01-30 2014-05-20 Praxair Technology, Inc. Air separation apparatus and method
US20100192629A1 (en) * 2009-01-30 2010-08-05 Richard John Jibb Oxygen product production method
US20130086941A1 (en) * 2011-10-07 2013-04-11 Henry Edward Howard Air separation method and apparatus
US20150114037A1 (en) * 2013-10-25 2015-04-30 Neil M. Prosser Air separation method and apparatus
FR3066809B1 (fr) 2017-05-24 2020-01-31 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede et appareil pour la separation de l'air par distillation cryogenique
JP6900241B2 (ja) 2017-05-31 2021-07-07 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 ガス製造システム
EP3438584B1 (de) 2017-08-03 2020-03-11 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren und gerät zur trennung von luft durch kryogene destillation
FR3072451B1 (fr) * 2017-10-13 2022-01-21 Air Liquide Procede et appareil de separation d'air par distillation cryogenique
CN114909189A (zh) * 2022-05-11 2022-08-16 重庆大学 一种新型吸附式压缩储能系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504029A1 (de) * 1991-03-11 1992-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren zur Herstellung von gasförmigem Sauerstoff unter Druck
FR2688052A1 (fr) * 1992-03-02 1993-09-03 Grenier Maurice Procede et installation de production d'oxygene et/ou d'azote gazeux sous pression par distillation d'air.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461906A1 (fr) * 1979-07-20 1981-02-06 Air Liquide Procede et installation cryogeniques de separation d'air avec production d'oxygene sous haute pression
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.
FR2706595B1 (fr) * 1993-06-18 1995-08-18 Air Liquide Procédé et installation de production d'oxygène et/ou d'azote sous pression à débit variable.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504029A1 (de) * 1991-03-11 1992-09-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren zur Herstellung von gasförmigem Sauerstoff unter Druck
FR2688052A1 (fr) * 1992-03-02 1993-09-03 Grenier Maurice Procede et installation de production d'oxygene et/ou d'azote gazeux sous pression par distillation d'air.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0789208A1 (de) * 1996-02-12 1997-08-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren und Einrichtung zur Herstellung von gasförmigem Sauerstoff unter hohe Druck
FR2744795A1 (fr) * 1996-02-12 1997-08-14 Grenier Maurice Procede et installation de production d'oxygene gazeux sous haute pression
US5735142A (en) * 1996-02-12 1998-04-07 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for producing high pressure oxygen
KR100466917B1 (ko) * 1996-02-12 2005-04-22 레르 리뀌드, 소시에떼 아노님 아 디렉또와르 에 꽁세예 드 쉬르베양스 뿌르 레뛰드 에 렉스쁠로아따시옹 데 프로세데 죠르쥬 끌로드 고압산소를생산하는방법및장치
EP1067345A1 (de) * 1999-07-05 2001-01-10 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
EP2176610A4 (de) * 2007-08-10 2018-03-21 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Verfahren und vorrichtung zur trennung von luft durch kryogene destillation
FR2943772A1 (fr) * 2009-03-27 2010-10-01 Air Liquide Appareil et procede de separation d'air par distillation cryogenique
WO2010109149A3 (fr) * 2009-03-27 2011-09-15 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Appareil et procédé de séparation d'air par distillation cryogénique
FR3014545A1 (fr) * 2013-12-05 2015-06-12 Air Liquide Procede et appareil de separation d’air par distillation cryogenique
WO2015082860A3 (fr) * 2013-12-05 2015-12-10 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé et appareil de séparation d'air par distillation cryogénique

Also Published As

Publication number Publication date
FR2721383A1 (fr) 1995-12-22
DE69511013T2 (de) 2000-01-20
ZA955051B (en) 1996-02-15
JPH08175806A (ja) 1996-07-09
CN1120652A (zh) 1996-04-17
DE69511013D1 (de) 1999-09-02
US5596885A (en) 1997-01-28
CN1081782C (zh) 2002-03-27
CA2152010A1 (fr) 1995-12-21
KR960001706A (ko) 1996-01-25
EP0689019B1 (de) 1999-07-28
FR2721383B1 (fr) 1996-07-19
ES2136259T3 (es) 1999-11-16

Similar Documents

Publication Publication Date Title
EP0689019B1 (de) Verfahren und Einrichtung zur Herstellung von gasförmigem Drucksauerstoff
EP0547946B2 (de) Verfahren zur Herstellung unreinen Sauerstoffs
EP0628778B2 (de) Verfahren und Hochdruckgasversorgungseinheit für eine ein Luftbestandteil verbrauchende Anlage
EP0504029B1 (de) Verfahren zur Herstellung von gasförmigem Sauerstoff unter Druck
EP0576314B1 (de) Verfahren und Apparat zur Herstelling von gasförmigem Sauerstoff unter Druck
WO2007068858A2 (fr) Procédé de séparation d'air par distillation cryogénique
EP0606027B1 (de) Lufttrennungsverfahren und Anlage zur Herstellung von wenigstens einem Druckgasprodukt und von wenigstens einer Flüssigkeit
EP0789208A1 (de) Verfahren und Einrichtung zur Herstellung von gasförmigem Sauerstoff unter hohe Druck
FR2690982A1 (fr) Procédé et installation de production d'oxygène gazeux impur par distillation d'air.
CA2119597A1 (fr) Procd et installation de production d'oxygne gazeux et/ou d'azote gazeux sous pression par distillation d'air
EP1014020A1 (de) Kryogenisches Luftzerleggungsverfahren
FR2711778A1 (fr) Procédé et installation de production d'oxygène et/ou d'azote sous pression.
EP0677713B1 (de) Verfahren und Vorrichtung zur Herstellung von Sauerstoff durch Rektifikation von Luft
FR2688052A1 (fr) Procede et installation de production d'oxygene et/ou d'azote gazeux sous pression par distillation d'air.
EP0612967B1 (de) Verfahren zur Herstellung von Sauerstoff und/oder Stickstoff unter Druck
EP0611218B2 (de) Verfahren und Anlage zur Herstellung von Drucksauerstoff
EP1132700B1 (de) Verfahren und Vorrichtung zur kryogenischen Luftzerlegung
EP0641982A1 (de) Verfahren und Einrichtung zur Herstellung von wenigstens einem Gas aus Druckluft
EP0595673A1 (de) Verfahren und Anlage zur Herstellung von Stickstoff und Sauerstoff
FR2837564A1 (fr) Procede et installation de production d'oxygene et/ou d'azote sous pression et d'argon pur
FR2862004A1 (fr) Procede et installation d'enrichissement d'un flux gazeux en l'un de ses constituants
EP3913310A1 (de) Verfahren und gerät zur trennung von luft durch kryogene destillation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19960627

17Q First examination report despatched

Effective date: 19980203

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 69511013

Country of ref document: DE

Date of ref document: 19990902

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990825

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2136259

Country of ref document: ES

Kind code of ref document: T3

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: LINDE AKTIENGESELLSCHAFT

Effective date: 20000428

NLR1 Nl: opposition has been filed with the epo

Opponent name: LINDE AKTIENGESELLSCHAFT

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010511

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010517

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010518

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010522

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010523

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20010607

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20010608

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010621

Year of fee payment: 7

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020619

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020620

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020620

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020630

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR

BERE Be: lapsed

Owner name: S.A. L'*AIR LIQUIDE POUR L'ETUDE ET L'EXPLOITATION

Effective date: 20020630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030101

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020619

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 20030207