US3258929A - Liquefaction and separation of air components - Google Patents

Liquefaction and separation of air components Download PDF

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Publication number
US3258929A
US3258929A US273883A US27388363A US3258929A US 3258929 A US3258929 A US 3258929A US 273883 A US273883 A US 273883A US 27388363 A US27388363 A US 27388363A US 3258929 A US3258929 A US 3258929A
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Prior art keywords
nitrogen
zone
argon
column
air
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Expired - Lifetime
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US273883A
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English (en)
Inventor
Fleur James K La
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La Fleur Corp
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La Fleur Corp
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Publication date
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Priority to US273883A priority Critical patent/US3258929A/en
Priority to GB10575/64A priority patent/GB1000074A/en
Priority to FR967610A priority patent/FR1386797A/fr
Priority to BE645251A priority patent/BE645251A/xx
Priority to CH343264A priority patent/CH422023A/fr
Priority to LU45690D priority patent/LU45690A1/xx
Application granted granted Critical
Publication of US3258929A publication Critical patent/US3258929A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/044—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
    • F25J3/04248—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
    • F25J3/0426—The cryogenic component does not participate in the fractionation
    • 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
    • F25J3/04278—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the 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
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/923—Inert gas
    • Y10S62/924—Argon

Definitions

  • the present invention relates to the construction and arrangement of two rectifier columns usable for the liquefaction and substantially complete separation of the air components oxygen, argon, and nitrogen, and to processes for operating such columns and for achieving such liquefaction and separation, such columns to be operated at and such liquefaction and separation to take place at substantially atmospheric pressure.
  • the problems of the prior art have not been due to an absence of adequate refrigeration 'but due to an improper use of that refrigeration available.
  • the disclosure of the present invention presupposes means for achieving the desired and needed refrigeration.
  • This refrigeration is preferably a gas having a critical temperature below that of nitrogen as it is desired torectify in both columns at atmospheric pressure. Further, it is presumed that the needed amount of refrigeration is available. While the refrigeration must be adequate, the present invention makes a highly economical use of it so that the refrigeration used is at a minimum.
  • Another object is that of constructing such rectifier columns so that in each column reflux may be accumulated and its rate of delivery to the plates may be controlled.
  • a further object of the invention is that of separating the components of air in only two columns so as to obtain oxygen, argon, and nitrogen with individual purities of better than 99.5 percent.
  • a process and apparatus for the liquefaction and separation of air components in which a first and a second rectifier column is each supplied with top refrigeration for the formation of the reflux necessary for column operation, in which the refrigerant is a gas having a lower boiling point than nitrogen, in which the bottom of the first column collects the oxygen of the air and the bottom of the second column collects the argon of the air, in which the refrigerant passes first thru the second column and then thru the first column, and in which the air to be treated, before entering the first column at substantially atmospheric pressure, carries reboil heat to the first and then to the second column bottom.
  • the figure is a schematic showing of two rectifier columns embodying the present invention and adapted to practice the process of the present invention.
  • atmospheric air is drawn into a turbo-compressor 11 where it is compressed to approximately 45 p.s.i., after which it is treated in a treatment plant 12 to remove contaminants such as carbon dioxide, sulphur, and water, and then flows thru conduit 13 and one of two valves 14, 15 to one of two precoolers 16, 17.
  • the air is cooled to about 177 R. (Rankine) by the counter-passage of uncondensed nitrogen leaving the top of the second 19 of two columns 18, 19, as will later be described. From the precoolers the air passes thru conduit 21 to one of two adsorbers 22, 23 that remove any remaining contaminants.
  • the air is then directed by conduit 24 thru heat exchanger, or reboil, coils 26, 27 in series in the columns 18, 19, respectively, air emerging from the last coil at a temperature of about 163 R.
  • heat exchanger or reboil
  • coils 26, 27 in series in the columns 18, 19, respectively, air emerging from the last coil at a temperature of about 163 R.
  • liquid oxygen accumulates at the bottom of the column 18 and liquid argon at the bottom of column 19, as will later appear.
  • This 163 R. air is then led thru a conduit 28 to and expanded to substantially atmospheric pressure, 25 p.s.i.a., thru an expansion valve 29, and then introduced into the first, or oxygen, column 18 at substantially the composition point of air in the column, the point 31.
  • the columns 18, 19, respectively, have means (not shown in detail), such as bubble cap trays 32, to bring the gas passing upward in the columns and thru the caps into intimate contact with condensed reflux liquid passing downward, over, and thru the trays therein.
  • the columns 18, 19 are operated at close to atmospheric pressure.
  • Refrigeration is provided by a cold coil 34, condenser coil, at the top of the oxygen column 18 to liquify some of the argon and nitrogen to provide the necessary reflux for the column operation.
  • the flow of reflux from the condenser coil 34 to the trays is regulated by a reflux valve 35 below a storage vessel 36, or receiver.
  • Liquid oxygen collects in the bottom of the column "and is removed therefrom thru a conduit 37 secured to and thru the column bottom.
  • a saturated vapor mixture of nitrogen and argon flows as overhead product from the first column 18 thru a conduit 33 or as a liquid thru a valve 39 to the conduit 38 and then to the second column 19, the argon column, where the mixture is rectified into its argon and nitrogen components.
  • the argon-nitrogen feed thru the inlet conduit 38 is to that portion of the column having the position point of the feed.
  • the argon liquifies and collects in the bottom of the column for removal therefrom thru a drain conduit 41 secured to and thru such bottom.
  • a large proportion of the nitrogen overhead is liquified by a cold coil 42 at the top of the column and the liquid nitrogen is removed by a conduit 43.
  • Condensed nitrogen also, provides the reflux liquid for the column, and its flow is controlled by a valve 44 fromv a condensate storage vessel 45, or receiver. Uncondensed nitrogen passes as part of the overhead thru a conduit 46 to the air 3 coolers 16, 17 from which it is exhausted as waste product at substantially ambient temperature.
  • each of the rectifier columns 18, 19 heat is supplied at the bottom by the compressed air before it is expanded into the first column 18.
  • the air enters the first column 18 it passes upward thru the trays 32 and into intimate contact with the oxygen-argon-nitrogen liquid thereon, which is descending from tray to tray, to give up its oxygen content thereto.
  • the heat exchange coil 26 in the bottom of the column transfers heat from the incoming air to the liquid bottom oxygen to vaporize a portion thereof to provide an upward vapor flow to remove argon and nitrogen from the downwardly moving liquid. This vaporized oxygen is condensed on the plates thereabove by the descending liquids from thereabove.
  • the temperature differential maintained between the bottom and the top of the column constitutes the drive of the column to effect the rectification and condensation taking place therein.
  • the absolute temperatures maintained in the column determine the type of products obtained, and the heat transfer rate determines the amount of overhead product obtained within design limits.
  • the operation of the second column 19 is in principle the same as that of the oxygen column, resulting in the separation of nitrogen and argon, and the production of these gases in liquid form with some gaseous nitrogen passing out thru the overhead conduit 46 leading to the air precoolers 16, 17.
  • the argon-nitrogen vapor is led from the first column 18 into the second column 19 at substantially its composition point, that point in the column having vapor of the same composition.
  • Pure liquid nitrogen condensed in the top of the column 19 by the cold coil 42 supplies the reflux liquid which descends thru the column to become enriched with argon and to lose nitrogen in the process until at the bottom of the column the liquid is pure argon.
  • the flow of refrigerant is first to the second column 19, the argon column, and then to the first column 18, the oxygen column, and that the flow of the input air for heating the column bottoms is first to the bottom of the first column 18 and then to the bottom of the second column 19.
  • the flow of refrigerant is counter current to the flow of incoming air as it is being precooled by such refrigerant.
  • the oxygen column is acted on by the warmer air and refrigerant, and the argon column by the colder air and refrigerant, which is as it should be as the oxygen has the highest boiling temperature of the three gases being condensed and separated.
  • a process for the rectification of air to yield oxygen, argon, and nitrogen that comprises: establishing a first and a second rectification zone, passing a stream of air in heat exchange relationship with said first and then said second zone to provide reboil heat for said zones, then passing said stream of air to said first zone for rectification therein into liquid oxygen product and an overhead of argon and nitrogen, passing a separate and independent stream of refrigerated gas selected from the group consisting of helium, hydrogen and neon in heat exchange relationship with said second zone and then with said first zone to provide reflux for said zones, removing said liquid oxygen and said overhead of argon and nitrogen from said first zone, introducing said argon and nitrogen overhead to said second zone for rectification therein to liquid argon product and an overhead of nitrogen, and removing said liquid argon and said nitrogen overhead from said second zone.
  • a process for separating oxygen, argon and nitrogen from air that comprises: treating the air in a primary rectification zone in such a manner as to produce therein a liquid oxygen product fraction and an argon-nitrogen overhead, transferring said argon-nitrogen overhead to a secondary rectification zone wherein it is treated to produce therein liquid argon product fraction and a nitrogen overhead, and removing said liquid argon and nitrogen overhead from said secondary zone; and prior to treating said air in said primary zone, passing it in heat exchange relationship with said primary zone and then said secondary zone to provide reboil heat for said zones, and passing a separate and independent stream of refrigerated gas selected from the group consisting of helium, hydrogen and neon, in heat exchange relationship with said secondary zone and then said primary zone to provide reflux for said zones.
  • the method of separating out substantially pure components of oxygen, argon and nitrogen from air which comprises introducing air into a first rectification zone at substantially the composition point of air in said zone and at a pressure close to but somewhat above atmospheric pressure, rectifying in said zone to remove liquid oxygen from the bottom thereof substantially free of argon and nitrogen and removing argon and nitrogen as overhead from said first zone, passing said argon and nitrogen directly to a second rectification zone at substantially their composition point in said second zone and at a pressure somewhat above atmospheric but less than the pressure in said first zone, rectifying the mixture of argon and nitrogen to remove liquid argon free of nitrogen from the bottom of said second zone and nitrogen as overhead from said second zone, said nitrogen being removed as overhead from said second rectification zone at a pressure sufiiciently above atmospheric to cause said nitrogen to flow as overhead from said second rectification zone, and said air being introduced to said first rectifica 'tion zone at a pressure sufficiently above atmospheric to cause the flow through said first and second rectification zones, refrigerating the top of each of
  • the method for separating out the components of oxygen, argon, and nitrogen from air which comprises introducing air into a first rectification zone at approximately atmospheric pressure, rectifying in said zone to remove oxygen as a product from the lower portion of said zone and a mixture of argon and nitrogen as overhead from said zone, passing said argon and nitrogen to a second rectification zone, rectifying the mixture of argon and nitrogen to remove argon as a .product from the lower portion of said second rectification zone and removing nitrogen as an overhead product of said second zone, and refrigerating the top of each of said zones by heat exchange therewith of a separate and independent gas refrigerant selected from the group consisting of helium, hydrogen and neon, by passing said gas to said second zone and then to said first zone, said gas as it is passed to said second zone being at a temperature below the temperature of liquid nitrogen at the pressure in said second zone, and prior to introduction of said air into the first rectification zone, passing said air in heat exchange relation With the bottom of said first rectification zone and then

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US273883A 1963-04-18 1963-04-18 Liquefaction and separation of air components Expired - Lifetime US3258929A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US273883A US3258929A (en) 1963-04-18 1963-04-18 Liquefaction and separation of air components
GB10575/64A GB1000074A (en) 1963-04-18 1964-03-12 Cold separation of tertiary gas mixtures
FR967610A FR1386797A (fr) 1963-04-18 1964-03-16 Liquéfaction et séparation des constituants de l'air
BE645251A BE645251A (US20110009641A1-20110113-C00116.png) 1963-04-18 1964-03-16
CH343264A CH422023A (fr) 1963-04-18 1964-03-17 Procédé de séparation de l'oxygène l'argon et l'azote de l'air
LU45690D LU45690A1 (US20110009641A1-20110113-C00116.png) 1963-04-18 1964-03-18

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Application Number Priority Date Filing Date Title
US273883A US3258929A (en) 1963-04-18 1963-04-18 Liquefaction and separation of air components

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US3258929A true US3258929A (en) 1966-07-05

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US273883A Expired - Lifetime US3258929A (en) 1963-04-18 1963-04-18 Liquefaction and separation of air components

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US (1) US3258929A (US20110009641A1-20110113-C00116.png)
BE (1) BE645251A (US20110009641A1-20110113-C00116.png)
CH (1) CH422023A (US20110009641A1-20110113-C00116.png)
FR (1) FR1386797A (US20110009641A1-20110113-C00116.png)
GB (1) GB1000074A (US20110009641A1-20110113-C00116.png)
LU (1) LU45690A1 (US20110009641A1-20110113-C00116.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899162A (zh) * 2021-10-15 2022-01-07 华能（天津）煤气化发电有限公司 一种igcc电站用快速变负荷的空分装置及其控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2705141B1 (fr) * 1993-05-11 1995-07-28 Air Liquide Procede et installation cryogenique de production d'argon.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US815601A (en) * 1903-10-22 1906-03-20 Charles F Brush Apparatus for producing pure nitrogen.
US1360853A (en) * 1914-12-29 1920-11-30 Linde Air Prod Co Apparatus and method for separating the constituents of air or other gaseous mixtures
US1664205A (en) * 1924-03-19 1928-03-27 Gen Electric Process of and apparatus for isolating argon
US2240925A (en) * 1936-11-02 1941-05-06 Baufre William Lane De Rectification of gaseous mixtures
US2982106A (en) * 1959-07-30 1961-05-02 Ambler Ernest Low temperature refrigeration apparatus and process
US3037359A (en) * 1958-10-21 1962-06-05 American Messer Corp Rare gas recovery process
US3062016A (en) * 1957-12-31 1962-11-06 Air Reduction Maintaining high purity argon atmosphere
US3123457A (en) * 1960-12-22 1964-03-03 E smith

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US815601A (en) * 1903-10-22 1906-03-20 Charles F Brush Apparatus for producing pure nitrogen.
US1360853A (en) * 1914-12-29 1920-11-30 Linde Air Prod Co Apparatus and method for separating the constituents of air or other gaseous mixtures
US1664205A (en) * 1924-03-19 1928-03-27 Gen Electric Process of and apparatus for isolating argon
US2240925A (en) * 1936-11-02 1941-05-06 Baufre William Lane De Rectification of gaseous mixtures
US3062016A (en) * 1957-12-31 1962-11-06 Air Reduction Maintaining high purity argon atmosphere
US3037359A (en) * 1958-10-21 1962-06-05 American Messer Corp Rare gas recovery process
US2982106A (en) * 1959-07-30 1961-05-02 Ambler Ernest Low temperature refrigeration apparatus and process
US3123457A (en) * 1960-12-22 1964-03-03 E smith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899162A (zh) * 2021-10-15 2022-01-07 华能（天津）煤气化发电有限公司 一种igcc电站用快速变负荷的空分装置及其控制方法

Also Published As

Publication number Publication date
FR1386797A (fr) 1965-01-22
BE645251A (US20110009641A1-20110113-C00116.png) 1964-09-16
GB1000074A (en) 1965-08-04
LU45690A1 (US20110009641A1-20110113-C00116.png) 1964-09-18
CH422023A (fr) 1966-10-15

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