US3222878A - Method and apparatus for fractionation of air - Google Patents

Method and apparatus for fractionation of air Download PDF

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Publication number
US3222878A
US3222878A US330019A US33001963A US3222878A US 3222878 A US3222878 A US 3222878A US 330019 A US330019 A US 330019A US 33001963 A US33001963 A US 33001963A US 3222878 A US3222878 A US 3222878A
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column
oxygen
conduit
fractionation
air
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Becker Rudolf
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Linde GmbH
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Gesellschaft fuer Lindes Eismaschinen AG
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    • 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
    • F25J3/04248—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
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04369—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of argon or argon enriched stream
    • 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
    • F25J3/044—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 single pressure main column system only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/0466—Producing crude argon in a crude argon column as a parallel working rectification column or auxiliary column system 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon 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
    • F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
    • 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

Definitions

  • This invention relates to a method and an apparatus for fractionation of air by liquefaction and rectification, in which the separated oxygen product is passed in liquid condition through pressure increasing means and is then passed through a heat exchanger to be vaporized by heat from a circulating gas and brought to the temperature of the surroundings.
  • the principal objects of this invention are to eliminate the above-mentioned disadvantages by keeping the circulating gas under only a moderate pressure, and also at the same time using open circulation.
  • a circulating gas which consists of a mixture of 8 to 30% oxygen, preferably 20 to 25% oxygen, not more than nitrogen, and the remainder being argon.
  • a preferred feature of this invent-ion is that the moderately compressed gaseous mixture which is liquefied by heat exchange with vaporizing oxygen is delivered with expansion in open circulation directly into the head of an auxiliary column.
  • the bottom portion of this auxiliary column is supplied with argon-containing gases from a low pressure air fractionating column while oxygen-enn'ched liquid from the foot of the auxiliary column is returned to the air-fractionating column.
  • Small amounts of nitrogen-enriched gases are released from the head of the auxiliary column, and from the middle portion of the latter, the vaporized and partially rectified circulating gas is drawn off, to be warmed by heat exchange with the air to be fractionated, and then to be compressed.
  • the amount of the circulating gases is preferably only 20 to 50%, more preferably 30 to 40% greater than the amount of oxygen to be vaporized.
  • the compressed circulating gas mixture cooled and at least partly liquefied before it passes through the r expansion value and into the auxiliary column, by being brought into heat exchange first with at least partly vaporized compressed oxygen that is to be heated, then with the above-mentioned portion of the cooled and cleansed air, and finally for vaporizing the liquid oxygen that has been directly taken from the liquid oxygen pressure-pump.
  • FIGURES 1 and 2 are schematic flowsheets of preferred specific embodiments of this invention. It is to be understood, however, that these embodiments are not to be considered limitative in any way whatsoever of the appended claims which particularly point out and distinctly claim the subject matter which is regarded as the invention.
  • FIGURE 1 air under about 4.5 atm. pressure (about 3000 Nm. per hour) is delivered by conduit 1 to one of the two regenerators 2 and 3 (e.g. 2) in which it is extremely cooled with separation therefrom of water and carbon dioxide.
  • the extremely cooled and cleansed air is discharged through conduit 4, and a portion of it (e.g. 1800 Nm. per hour) passes through conduit 5, heater 6 in the low pressure fractionating or separating column 7, conduit 8, sub-cooler 9, expansion valve 10 and conduit 11 for delivery as reflux liquid to the fractionating column 7.
  • Another portion (e.g. 1200 N111. per hour) of the extremely cooled and purified air is passed through conduit 12, through heat exchanger 13 to be warmed again by the circulating gas which is cooled thereby, then through conduit 14, expansion turbine 15, and conduit 16 to be delivered in the gaseous condition to the middle portion of the fractionating column 7.
  • liquid oxygen is drawn off through pipe 20 by means of a pump 21 while being brought to the desired pressure (e.g. 25 atm. gage) and is delivered through pipe 22 to vaporizing heat exchanger 23 and then through pipe 24 to heat exchanger 25 in which it is warmed to the surrounding temperature by the circulating gas.
  • Gaseous oxygen under pressure e.g. 370 Nm. per hour
  • conduit 27 a certain amount of liquid oxygen can also be obtained from conduit 27.
  • a circulating gas mixture (e.g. 500 Nm. per hour) containing about 25% oxygen, about 5% nitrogen and about argon is compressed by the compressor 28 to about 32 atm. gage, and delivered by conduit 29, in
  • a gaseaus mixture of about 94% oxygen, about 2% nitrogen, and about 4% argon (e.g. 500 Nm. per hour) which was drawn off from the fractionating column 7 below its middle point where air enters from conduit 16, is introduced through conduit 37.
  • an oxygen-enriched liquid e.g. 490 Nm. per hour
  • an oxygen-enriched liquid e.g. 490 Nm. per hour
  • auxiliary column 36 From the head of the auxiliary column 36 a small amount (e.g. 10 Nm. per hour) of nitrogen-enriched gas of about 10% O 50% N and 40% A is drawn off by conduit 39 so that the circulating gas will not become enriched with nitrogen and other undesired substances.
  • This drawn-off gas after passing through regulating valve 40 and conduit 41 is mixed with the nitrogen in conduit 17 from separating column 7.
  • vaporized and partially rectified circulating gas is taken off by conduit 42 and after passage through coils 43 in regenerators 2 and 3 to be warmed up by the air that is to be fractionated, is delivered by conduit 44 to compressor 28 which completes the closed circuit.
  • FIGURE 2 differs from FIGURE 1 only in that a double fractionating column 7', 7" is used instead of the single column rectifier. Corresponding parts are designated by the same reference characters as in FIGURE 1.
  • a process for producing oxygen by low temperature fractionation which comprises the after-fractionation steps of withdrawing liquid oxygen from a fractionation column, compressing said liquid oxygen, and vaporizing the resultant compressed liquid oxygen in indirect heat transfer relationship with a compressed circulating gas, the improvement which comprises employing as said gas, a gaseous mixture of 8-30 mol percent oxygen, not more than 10 mol percent nitrogen, and the remainder consisting essentially of argon, said gaseous mixture being at least partially condensed during the vaporization of oxygen.
  • Apparatus for producing oxygen by low temperature fractionation which apparatus comprises:
  • a compressor having a low pressure side and a high pressure side, for compressing a circulating gas
  • indirect heat exchange means including a cold side inlet and outlet and a warm side inlet and outlet
  • first outlet conduit means connected to the head of the auxiliary fractionation column, said outlet conduit means being connected to a regulating valve to permit the controlled release of minor amount of nitrogen-enriched gases;
  • inlet conduit means connected to the bottom portion of the auxiliary fractionation column
  • fractionation column for the separation of air, said fractionation column having an outlet and an inlet conduit connected to the middle portion thereof;
  • conduit means connecting said outlet in said middle portion of said fractionation column with the inlet connected to the auxiliary fractionation column;
  • conduit means connecting the third outlet from the auxiliary fractionation column to the inlet in said fractionation column;
  • regenerator means for cooling and cleaning raw gas
  • conduit means connecting the second outlet from said auxiliary fractionation column to said heating coils imbedded in said regenerator means
  • conduit means connecting said heating coils with said compressor.
  • conduit means connecting the regulating valve at the outlet from the head of the auxiliary fractionation column to the head of the fractionation column, whereby nitrogenenriched gas from the auxiliary fractionation column can be mixed with nitrogen from the fractionation column; second indirect heat exchange means for conducting heat exchange between cooled and cleaned and at least partially condensed air and said combined nitrogen fractions whereby the cooled and cleaned air is subcooled for use as a reflux liquid for the fractionation column; conduit means connecting the head of the fractionation column with said second indirect heat exchange means; and conduit means connecting the second indirect heat exchange means with the regenerators.
  • the apparatus of claim 12 further comprising third indirect heat exchange means; turbine means; and conduit means connecting the regenerators with the third heat exchange means; conduit means connecting the third heat exchange means with said turbine means; and conduit means connecting said turbine means with the middle portion of the fractionation column, whereby the cooled and cleaned air from the regenerators is warmed by circulating gas expanded in said turbine means and passed to the fractionation column.
  • the indirect heat exchange means comprises two heat exchangers; and further comprising third heat exchange means interposed in series between the two heat exchangers with relation to the passage of the circulating gas, said third heat exchange means being connected on the cold side by conduit means connecting the regenerators with the third heat exchange means; and a turbine; and further conduit means connecting the turbine with the middle portion of the fractionation column whereby the cooled and cleaned air is heated in indirect heat transfer relationship with the circulating gas, is further expanded while doing external work, and is then passed to the fractionation column.
  • the fractionation column comprises one low pressure column having heating means disposed in the sump thereof, said heating means comprising conduit means being connected on the inlet side to the regenerator means and on the outlet side to the head of the fractionation column by way of an expansion device and an oxygen outlet at the foot of said one low pressure column.
  • the fractiontion column comprises a double column having a high pressure lower column and a low pressure upper column, and wherein the condenser for the high pressure column is disposed in the bottom of the low pressure column, whereby it can function as a vaporizer and a condenser; outlet conduit means at the sump of the high pressure column; and wherein the conduit means connecting the auxiliary fractionation column with the fractionation column are connected with the low pressure column; and conduit and expansion valve means connecting the foot of the high pressure column with the upper portion of the low pressure column.

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  • 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)
US330019A 1962-12-21 1963-12-12 Method and apparatus for fractionation of air Expired - Lifetime US3222878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG36700A DE1229561B (de) 1962-12-21 1962-12-21 Verfahren und Vorrichtung zum Zerlegen von Luft durch Verfluessigung und Rektifikation mit Hilfe eines Inertgaskreislaufes

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500651A (en) * 1966-01-13 1970-03-17 Linde Ag Production of high pressure gaseous oxygen by low temperature rectification of air
US4345925A (en) * 1980-11-26 1982-08-24 Union Carbide Corporation Process for the production of high pressure oxygen gas
US4384876A (en) * 1980-08-29 1983-05-24 Nippon Sanso K.K. Process for producing krypton and Xenon
US4747860A (en) * 1986-08-28 1988-05-31 The Boc Group Plc Air separation
US4747859A (en) * 1986-09-12 1988-05-31 The Boc Group Plc Air separation
US4932212A (en) * 1988-10-12 1990-06-12 Linde Aktiengesellschaft Process for the production of crude argon
US5228296A (en) * 1992-02-27 1993-07-20 Praxair Technology, Inc. Cryogenic rectification system with argon heat pump
US5337571A (en) * 1991-09-18 1994-08-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the production of oxygen gas under high pressure by air distillation
US5337569A (en) * 1992-03-24 1994-08-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the transfer of liquid
DE102007031759A1 (de) 2007-07-07 2009-01-08 Linde Ag Verfahren und Vorrichtung zur Erzeugung von gasförmigem Druckprodukt durch Tieftemperaturzerlegung von Luft
DE102007031765A1 (de) 2007-07-07 2009-01-08 Linde Ag Verfahren zur Tieftemperaturzerlegung von Luft
DE102009034979A1 (de) 2009-04-28 2010-11-04 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Erzeugung von gasförmigem Drucksauerstoff
EP2312248A1 (de) 2009-10-07 2011-04-20 Linde Aktiengesellschaft Verfahren und Vorrichtung Gewinnung von Drucksauerstoff und Krypton/Xenon
EP2458311A1 (de) 2010-11-25 2012-05-30 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Gewinnung eines gasförmigen Druckprodukts durch Tieftemperaturzerlegung von Luft
DE102010052544A1 (de) 2010-11-25 2012-05-31 Linde Ag Verfahren zur Gewinnung eines gasförmigen Druckprodukts durch Tieftemperaturzerlegung von Luft
EP2520886A1 (de) 2011-05-05 2012-11-07 Linde AG Verfahren und Vorrichtung zur Erzeugung eines gasförmigen Sauerstoff-Druckprodukts durch Tieftemperaturzerlegung von Luft
EP2568242A1 (de) 2011-09-08 2013-03-13 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Gewinnung von Stahl
EP2600090A1 (de) 2011-12-01 2013-06-05 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Erzeugung von Drucksauerstoff durch Tieftemperaturzerlegung von Luft
DE102011121314A1 (de) 2011-12-16 2013-06-20 Linde Aktiengesellschaft Verfahren zur Erzeugung eines gasförmigen Sauerstoff-Druckprodukts durch Tieftemperaturzerlegung von Luft
DE102013017590A1 (de) 2013-10-22 2014-01-02 Linde Aktiengesellschaft Verfahren zur Gewinnung eines Krypton und Xenon enthaltenden Fluids und hierfür eingerichtete Luftzerlegungsanlage
DE102012017488A1 (de) 2012-09-04 2014-03-06 Linde Aktiengesellschaft Verfahren zur Erstellung einer Luftzerlegungsanlage, Luftzerlegungsanlage und zugehöriges Betriebsverfahren
EP2784420A1 (de) 2013-03-26 2014-10-01 Linde Aktiengesellschaft Verfahren zur Luftzerlegung und Luftzerlegungsanlage
WO2014154339A2 (de) 2013-03-26 2014-10-02 Linde Aktiengesellschaft Verfahren zur luftzerlegung und luftzerlegungsanlage
EP2801777A1 (de) 2013-05-08 2014-11-12 Linde Aktiengesellschaft Luftzerlegungsanlage mit Hauptverdichterantrieb
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US3500651A (en) * 1966-01-13 1970-03-17 Linde Ag Production of high pressure gaseous oxygen by low temperature rectification of air
US4384876A (en) * 1980-08-29 1983-05-24 Nippon Sanso K.K. Process for producing krypton and Xenon
US4345925A (en) * 1980-11-26 1982-08-24 Union Carbide Corporation Process for the production of high pressure oxygen gas
US4747860A (en) * 1986-08-28 1988-05-31 The Boc Group Plc Air separation
US4747859A (en) * 1986-09-12 1988-05-31 The Boc Group Plc Air separation
US4932212A (en) * 1988-10-12 1990-06-12 Linde Aktiengesellschaft Process for the production of crude argon
US5337571A (en) * 1991-09-18 1994-08-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the production of oxygen gas under high pressure by air distillation
US5228296A (en) * 1992-02-27 1993-07-20 Praxair Technology, Inc. Cryogenic rectification system with argon heat pump
US5337569A (en) * 1992-03-24 1994-08-16 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the transfer of liquid
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EP2520886A1 (de) 2011-05-05 2012-11-07 Linde AG Verfahren und Vorrichtung zur Erzeugung eines gasförmigen Sauerstoff-Druckprodukts durch Tieftemperaturzerlegung von Luft
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