US2060940A - Process for obtaining krypton and xenon - Google Patents

Process for obtaining krypton and xenon Download PDF

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Publication number
US2060940A
US2060940A US724821A US72482134A US2060940A US 2060940 A US2060940 A US 2060940A US 724821 A US724821 A US 724821A US 72482134 A US72482134 A US 72482134A US 2060940 A US2060940 A US 2060940A
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Prior art keywords
xenon
krypton
rectification
oxygen
mixture
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US724821A
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Kahle Heinrich
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Union Carbide Corp
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Union Carbide and Carbon Corp
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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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04842—Intermittent process, so-called batch process
    • 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
    • F25J3/04624—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using integrated mass and heat exchange, so-called non-adiabatic rectification, e.g. dephlegmator, reflux exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04745—Krypton and/or Xenon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • 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
    • F25J2200/34—Processes or apparatus using separation by rectification using a side column fed by a stream from the 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
    • 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
    • F25J2200/52—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column in the high pressure column of a double 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/82—Processes or apparatus using other separation and/or other processing means using a reactor with combustion or catalytic reaction
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/50—One fluid being 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/12—Particular process parameters like pressure, temperature, ratios
    • 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
    • Y10S62/925—Xenon or krypton

Definitions

  • This invention relates to the separation of rare gases, such as krypton and xenon, from air, having special reference to a novel process for effecting such separation.
  • the gap in the miscibility of liquid krypton and xenon with oxygen before referred to is narrowed under increased pressures and disappears entirely above a pressure of about 1.7 atmos. gage, so that liquid krypton and xenon become infinitely miscible with liquid oxygen at such pressures.
  • the rectification of the mixture of oxygen and krypton and xenon is performed 5 under increased pressures, and preferably under a pressure above about 1.7 atmos. gage.
  • the rare gases and hydrocarbons become enriched by solution in liquid oxygen.
  • the hydrocarbons may be removed either continuously or periodically when their concentration reaches a dangerous value by any one of a number of well-known methods, such as filtration by adsorption, catalytic combustion, or other chemical reaction carried out with the gaseous oxygen.
  • the remaining mixture of oxygen, krypton and xenon is then separated in accordance with this invention by rectification under increased pressure and preferably under a pressure greater than about 1.7 atmos. gage.
  • krypton and xenon may be concentrated in solution in liquid oxygen to substantially any desired degree, and may thus be obtained in a relatively very pure state.
  • Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton and xenon obtained at the first enrichment of the rare gases by rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
  • Process for obtaining krypton and xenon by rectification which comprises removing the hydrocarbons from the mixture of oxygen, krypton and xenon obtained at the first enrichment of the rare gases, and separating the mixture of oxygen, krypton and xenon by rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
  • Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton and xenon obtained 60 at the first enrichment of the rare gases by rectification under a pressure above 1.7 atmos. gage.
  • Process for separating rare gases from air which comprises subjecting the air to rectification, whereby a mixture of liquid oxygen and rare gases is obtained; and subjecting said mixture to rectification under increased pressure, said prev,
  • Process for separating krypton and xenon from air which comprises subjecting the air to rectification, whereby a mixture 01 liquid omen, hydrocarbons, krypton, and xenon is obtained; removing the hydrocarbons from said mixture; and subjecting the remaining mixture to rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
  • Process for separating krypton and xenon from air which comprises subjecting the air to rectification, whereby a mixture of liquid oxygen, hydrocarbons, krypton, and xenon is obtained; removing the hydrocarbons from said mixture; and subjecting the remaining mixture to rectification under a pressure greater than 1.7 atmpa.
  • Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton, and xenon obtained at the first enrichment of the rare gases by subsequent rectification under an increased pressure sumcientto keep the major elements of the mixture in the liquid phase.

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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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Description

Patented Nov. 17, 1936 Heinrich Kahle, Hoellriegelskreuth, near Munich, Germany, assignor, by mesne assignments, to Union Carbide and Carbon Corporation, a corporaflon of New York I No Drawing. Application May 9, 1934, Serial No.
- 724,821. In Germany May 13, 1933 9 Claim.
This invention relates to the separation of rare gases, such as krypton and xenon, from air, having special reference to a novel process for effecting such separation.
Several processes are known according to which the rare gases, especially krypton and xenon, are
' obtained from the oxygen of air separation plants,
or directly from air, by rectification. Certain hydrocarbons, such as methane, ethane, ethylene, and acetylene, which occur in air in minute quantities, become concentrated in solution in liquid oxygen together with krypton and xenon and are removed when their concentration becomes dangerous. The remaining mixture of oxygen, krypton, and xenon is separated into its constituents by further rectification.
Since krypton and xenon are present in the air in the exceedingly small quantities of about 1 part in 1,000,000, and about 1-part in 10,000,000 respectively, very large volumes of air must be processed to obtain appreciable amounts of these rare gases. Since any increase in the pressure of rectification represents a substantial increase in power consumption, it is desirable and has heretofore been the practice to carry out the rectification of air or oxygen containing krypton and xenon at the lowest possible pressure, usually approximately atmospheric. This is especially the case because ordinarily the boiling curves of the constituents of mixtures are farther separated at lower pressures and rectification is thus more easily effected.
However, it was noticed in these prior processes that certain diificulties arose as the concentration of the solution of krypton and xenon in oxygen was increased, and it has now been found that krypton and xenon are not infinitely miscible with oxygen in liquid form, but that, at higher concentrations, the rare gases are separated in solid form at the pressures heretofore used for rectification. This separation in solid form occurs at'a mixture ratio which lies between pure krypton and xenon and the concentration of the starting mixture, so that the solid krypton and xenon are precipitated in the rectifying column, obstructing the column and interfering with or halting the rectification.
Therefore, it is the principal object of the present invention to provide a process for obtaming k pton and xenon which avoids these difllculties.
I have found-that the gap in the miscibility of liquid krypton and xenon with oxygen before referred to is narrowed under increased pressures and disappears entirely above a pressure of about 1.7 atmos. gage, so that liquid krypton and xenon become infinitely miscible with liquid oxygen at such pressures. Hence, in accordance with this invention, the rectification of the mixture of oxygen and krypton and xenon is performed 5 under increased pressures, and preferably under a pressure above about 1.7 atmos. gage.
During the rectification of air, the rare gases and hydrocarbons become enriched by solution in liquid oxygen. The hydrocarbons may be removed either continuously or periodically when their concentration reaches a dangerous value by any one of a number of well-known methods, such as filtration by adsorption, catalytic combustion, or other chemical reaction carried out with the gaseous oxygen. The remaining mixture of oxygen, krypton and xenon is then separated in accordance with this invention by rectification under increased pressure and preferably under a pressure greater than about 1.7 atmos. gage. By continued rectification in this manner, krypton and xenon may be concentrated in solution in liquid oxygen to substantially any desired degree, and may thus be obtained in a relatively very pure state.
It will, of course, be appreciated that certain changes may be made in the hereindescribed method without departing fromv the principles or exceeding the scope of this invention as indicated in the appended claims.
I claim:-
1. Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton and xenon obtained at the first enrichment of the rare gases by rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
2. Process for obtaining krypton and xenon by rectification which comprises removing the hydrocarbons from the mixture of oxygen, krypton and xenon obtained at the first enrichment of the rare gases, and separating the mixture of oxygen, krypton and xenon by rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
3. Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton and xenon obtained 60 at the first enrichment of the rare gases by rectification under a pressure above 1.7 atmos. gage.
4. Process for separating rare gases from air which comprises subjecting the air to rectification, whereby a mixture of liquid oxygen and rare gases is obtained; and subjecting said mixture to rectification under increased pressure, said prev,
sin-e being increased alter the primary rectification and for said final separation only. I
,5. Process for separating krypton and xenon from air which comprises subjecting the air to rectification, whereby a mixture 01 liquid omen, hydrocarbons, krypton, and xenon is obtained; removing the hydrocarbons from said mixture; and subjecting the remaining mixture to rectification under increased pressure, said pressure being increased after the primary rectification and for said final separation only.
6. Process for separating krypton and xenon from air which comprises subjecting the air to rectification, whereby a mixture of liquid oxygen, hydrocarbons, krypton, and xenon is obtained; removing the hydrocarbons from said mixture; and subjecting the remaining mixture to rectification under a pressure greater than 1.7 atmpa.
gage.
7. Process for obtaining krypton and xenon by rectification which comprises separating the mixture of oxygen, krypton, and xenon obtained at the first enrichment of the rare gases by subsequent rectification under an increased pressure sumcientto keep the major elements of the mixture in the liquid phase.
8. The process for producing substantially to keep the oxygen, krypton. and xenon m in the liquid phase.
US724821A 1931-11-14 1934-05-09 Process for obtaining krypton and xenon Expired - Lifetime US2060940A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEG81157D DE566151C (en) 1931-11-14 1931-11-14 Extraction of air components with a higher boiling point than oxygen
DEG83534D DE629297C (en) 1931-11-14 1932-09-09 Process for eliminating the hydrocarbon-related difficulties in the recovery of krypton and xenon from air by rectification
DE438196X 1933-05-13

Publications (1)

Publication Number Publication Date
US2060940A true US2060940A (en) 1936-11-17

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US634779A Expired - Lifetime US1963809A (en) 1931-11-14 1932-09-24 Process of obtaining constituents of air having a higher boiling point than oxygen
US724821A Expired - Lifetime US2060940A (en) 1931-11-14 1934-05-09 Process for obtaining krypton and xenon

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US634779A Expired - Lifetime US1963809A (en) 1931-11-14 1932-09-24 Process of obtaining constituents of air having a higher boiling point than oxygen

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US (2) US1963809A (en)
BE (2) BE391302A (en)
DE (4) DE566151C (en)
ES (1) ES127972A1 (en)
FR (2) FR44782E (en)
GB (3) GB390069A (en)
NL (2) NL39016C (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464891A (en) * 1943-08-28 1949-03-22 Linder Air Products Company Process of and apparatus for producing compressed oxygen
US2514921A (en) * 1944-11-16 1950-07-11 Linde Air Prod Co Process and apparatus for separating gas mixtures
US2698523A (en) * 1950-04-28 1955-01-04 Carthage Hydrocol Inc Manufacture of krypton and xenon
US2962868A (en) * 1956-02-17 1960-12-06 Air Reduction Method of concentrating kryptonxenon
US2990690A (en) * 1958-10-27 1961-07-04 Spencer Chem Co Argon purification process
US3191393A (en) * 1959-12-30 1965-06-29 Air Reduction Krypton-xenon separation from a gas mixture
US3222879A (en) * 1962-02-27 1965-12-14 Stoklosinski Roman Recovery of krypton and xenon from air separation plants
US4421536A (en) * 1980-08-29 1983-12-20 Nippon Sanso K.K. Process for producing krypton and xenon
CN1298620C (en) * 2002-12-12 2007-02-07 气体产品与化学公司 Process and equipment for recovering Kr and /or Xe
US20100175160A1 (en) * 2007-09-27 2010-07-15 Hd Inspiration Holding B.V. Visor and method of making the same

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE487786A (en) * 1943-05-27
US2423274A (en) * 1945-07-06 1947-07-01 Air Reduction Recovery of the components of air
US2497589A (en) * 1947-04-18 1950-02-14 Air Reduction Separation and recovery of the constituents of air
US2587820A (en) * 1947-05-16 1952-03-04 Independent Engineering Compan Vapor oxygen recondenser
US2509044A (en) * 1947-07-03 1950-05-23 Standard Oil Dev Co Separation of low molecular weight hydrocarbons from petroleum mixtures
US2615312A (en) * 1949-05-07 1952-10-28 Union Carbide & Carbon Corp Process and apparatus for eliminating impurities during the separation of gas mixtures
DE1099564B (en) * 1959-09-09 1961-02-16 Linde S Eismaschinen Ag Zweign Process and device for the enrichment of high-boiling substances during the decomposition of gas mixtures by low-temperature rectification
DE1158534B (en) * 1961-07-05 1963-12-05 Inst Chemie Und Kaelteausruest Process for obtaining a highly concentrated krypton-xenon mixture
GB1371327A (en) * 1970-10-12 1974-10-23 British Oxygen Co Ltd Air separation
DE2055099A1 (en) * 1970-11-10 1972-05-18 Messer Griesheim Gmbh, 6000 Frankfurt Process for the enrichment of krypton and xenon in air separation plants
GB8610766D0 (en) * 1986-05-02 1986-06-11 Colley C R Yield of krypton xenon in air separation
US20160197669A1 (en) * 2014-12-11 2016-07-07 Tesla Wireless Company LLC Communication method and system that uses low latency/low data bandwidth and high latency/high data bandwidth pathways

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2464891A (en) * 1943-08-28 1949-03-22 Linder Air Products Company Process of and apparatus for producing compressed oxygen
US2514921A (en) * 1944-11-16 1950-07-11 Linde Air Prod Co Process and apparatus for separating gas mixtures
US2698523A (en) * 1950-04-28 1955-01-04 Carthage Hydrocol Inc Manufacture of krypton and xenon
US2962868A (en) * 1956-02-17 1960-12-06 Air Reduction Method of concentrating kryptonxenon
US2990690A (en) * 1958-10-27 1961-07-04 Spencer Chem Co Argon purification process
US3191393A (en) * 1959-12-30 1965-06-29 Air Reduction Krypton-xenon separation from a gas mixture
US3222879A (en) * 1962-02-27 1965-12-14 Stoklosinski Roman Recovery of krypton and xenon from air separation plants
US4421536A (en) * 1980-08-29 1983-12-20 Nippon Sanso K.K. Process for producing krypton and xenon
CN1298620C (en) * 2002-12-12 2007-02-07 气体产品与化学公司 Process and equipment for recovering Kr and /or Xe
EP1429099B1 (en) * 2002-12-12 2018-01-17 Air Products And Chemicals, Inc. Process and apparatus for the recovery of krypton and/or xenon
US20100175160A1 (en) * 2007-09-27 2010-07-15 Hd Inspiration Holding B.V. Visor and method of making the same

Also Published As

Publication number Publication date
US1963809A (en) 1934-06-19
DE566151C (en) 1932-12-16
GB390069A (en) 1933-03-30
BE403024A (en)
FR44782E (en) 1935-04-06
NL42092C (en)
GB438196A (en) 1935-11-07
NL39016C (en)
ES127972A1 (en) 1932-11-01
DE641715C (en) 1937-02-11
FR743380A (en) 1933-03-29
GB413518A (en) 1934-07-19
DE629297C (en) 1936-04-27
BE391302A (en)
DE631639C (en) 1936-06-24

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