US1963809A - Process of obtaining constituents of air having a higher boiling point than oxygen - Google Patents
Process of obtaining constituents of air having a higher boiling point than oxygen Download PDFInfo
- Publication number
- US1963809A US1963809A US634779A US63477932A US1963809A US 1963809 A US1963809 A US 1963809A US 634779 A US634779 A US 634779A US 63477932 A US63477932 A US 63477932A US 1963809 A US1963809 A US 1963809A
- Authority
- US
- United States
- Prior art keywords
- krypton
- oxygen
- air
- liquid
- column
- 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.)
- Expired - Lifetime
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
- F25J3/04763—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
- the present invention relates to a process for obtaining constituents of air having a higher boiling point than oxygen; for example, krypton and xenon.
- krypton will 5 be used in the following specification and claims as representative of such higher boiling constituents.
- krypton-free or practically krypton-free washing liquid is essential for the successful operation of the process.
- the liquid nitrogen obtained in the separation of air could be used for this'purpose, because it has the greatest difference in boiling point from krypton of any of the constituents of air.
- krypton-free oxygen is used as the washing liquid, which is obtained by liquefying a portion of the separated oxygen by deep cooling in the upper part of the washer.
- the counter-current washing of the krypton out of the gaseous oxygen is effected most simply in a vertical tube sheaf, into the lower part of which the gaseous oxygen from the evaporator of the separation apparatus flows at about its boiling temperature.
- the tube sheaf is suitably cooled externally, advantageously by the cold nitrogen coming from the apparatus, which in temperature and amount suffices for the formation of the necessary amount of washing liquid.
- the formation of the washing liquid can also be effected in a condenser located at the head of the washing column and supplied with liquid air or liquid nitrogen.
- the further enrichment of the washing liquid in krypton can be effected most simply by returning the washing liquid from the washer into the oxygen evaporator of the air separation apparatus. In this way the krypton becomes more and more concentrated in the liquid oxygen in the evaporator, which at the end of a period of operation may be drawn 01f and worked up into pure krypton.
- Another method of enrichment which affords the possibility of continuously producing krypton of any desired concentration consists in passing the liquid oxygen coming from the washing column into a rectification column, advantageously situated under the washing column, and heated at its lower end. The vapors coming from this auxiliary column are returned to the lower part of the washingcolumn.
- this method of operation in order to obtain a quantitative yield of krypton, it is advantageous at' the end of a period of operation of the separation system to vaporize the liquid oxygen remaining in the evaporator into the washing column, or a small amount of liquid oxygen in the evaporator may be allowed to continuously flow into the auxiliary column, in order to avoid the concentrating of krypton in the condenser.
- l is a diagrammatic representation of apparatus for carrying out one embodiment of the invention
- Fig. 2 is a diagrammatic representation of apparatus for carrying out another em"- bodiment of the invention.
- the washing out and concentration of the krypton is efiected in rectification columns.
- the kryptoncontaining gaseous oxygen from the evaporator 3 of the air separation apparatus is led into the washing column 4, which is provided with rectifying plates.
- the condensation of the kryptonfree washing liquid takes place in condenser 5 which is cooled with liquid nitrogen supplied through valve 8.
- the operation of column 4 corresponds in principle with the previously described operation of tube sheaf 5 of Figure 1.
- the krypton-containing liquid oxygen at the bottom of the column passes into the enriching column 6 and is there further concentrated.
- the heating of this column isefiected by means of compressed air the amount of which is regulated by valve 9.
- the highly concentrated krypton can be drawn oil in gaseous form at 10 or can be drawn off from the evaporator 7 in liquid form. By this method of operation it is possible to obtain a continuous production of krypton of any desired concentration.
- the concentration of krypton in the oxygen depends on the length of time the air separation apparatus is operated.
- substantially all of the krypton present in the air'treated in a given period of operation will be found in the evaporator liquid. Since the amount of liquid in the evaporator is relatively large and the amount of krypton in the air is only 1:1,000,000, at the end of a normal period of operation only a small percentage of krypton will be found in the evaporator liquid.
- a further advantage of the new method is that by utilizing gaseous oxygen no obstruction of the rectifier plates by impurities is encountered, since it contains no noticeable trace of harmful impurities.
- the method of the invention provides a continuous and quantitative separation of krypton from the air in heretofore unattained concentration. It can be operated with the simplest means and at very low cost. Together with the krypton, other substanceshaving higher boiling points than oxygen are obtained, particularly xenon.
- An improvement in the method for obtaining krypton and xenon and other constituents of air having a higher boiling point than oxygen which comprises separating air by low temperature cooling and rectification into a low'boiling portion consisting of constituents of air of lower boilng point than oxygen and a high boiling portion containing substantially all of the oxygen, vaporizing oxygen from said high boiling portion, and subjecting all of the oxygen vaporized from said high boiling portion to countercurrent washing with liquid oxygen which has been freed of its krypton content by rectification.
- krypton and xenon and other constituents of air having a higher boiling point than oxygen which comprises separating air by low temperature cooling and rectification into a low boiling portion consisting of constituents of air of lower boiling point than oxygen and a high boiling portion containing substantially all of the oxygen, vaporizing oxygen from said high'boiling portion, passing all of the oxygen vaporized from said high boiling portion into the lower part of a rectification column cooled at its head with liquid nitrogen and subjecting the krypton-containing liquid from said column to rectification in a subjacent column from which the vapors pass into the upper column.
Landscapes
- 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)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG81157D DE566151C (de) | 1931-11-14 | 1931-11-14 | Gewinnung der Luftbestandteile mit hoeherem Siedepunkt als Sauerstoff |
DEG83534D DE629297C (de) | 1931-11-14 | 1932-09-09 | Verfahren zur Beseitigung der durch Kohlenwasserstoffe bedingten Schwierigkeiten bei der Gewinnung von Krypton und Xenon aus Luft durch Rektifikation |
DE438196X | 1933-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1963809A true US1963809A (en) | 1934-06-19 |
Family
ID=27205952
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US724821A Expired - Lifetime US2060940A (en) | 1931-11-14 | 1934-05-09 | Process for obtaining krypton and xenon |
Country Status (7)
Country | Link |
---|---|
US (2) | US1963809A (fr) |
BE (2) | BE391302A (fr) |
DE (4) | DE566151C (fr) |
ES (1) | ES127972A1 (fr) |
FR (2) | FR44782E (fr) |
GB (3) | GB390069A (fr) |
NL (2) | NL42092C (fr) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423274A (en) * | 1945-07-06 | 1947-07-01 | Air Reduction | Recovery of the components of air |
US2464891A (en) * | 1943-08-28 | 1949-03-22 | Linder Air Products Company | Process of and apparatus for producing compressed oxygen |
US2480093A (en) * | 1943-05-27 | 1949-08-23 | Air Prod Inc | Method of and apparatus for pumping liquid oxygen |
US2497589A (en) * | 1947-04-18 | 1950-02-14 | Air Reduction | Separation and recovery of the constituents of air |
US2509044A (en) * | 1947-07-03 | 1950-05-23 | Standard Oil Dev Co | Separation of low molecular weight hydrocarbons from petroleum mixtures |
US2587820A (en) * | 1947-05-16 | 1952-03-04 | Independent Engineering Compan | Vapor oxygen recondenser |
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 |
US3751934A (en) * | 1970-11-10 | 1973-08-14 | K Frischbier | Concentrating krypton and xenon in air separation by liquid oxygen wash |
US3779028A (en) * | 1970-10-12 | 1973-12-18 | British Oxygen Co Ltd | Improved krypton xenon recovery method |
JP2004205203A (ja) * | 2002-12-12 | 2004-07-22 | Air Products & Chemicals Inc | クリプトン及び/又はキセノンの回収方法及び装置 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2514921A (en) * | 1944-11-16 | 1950-07-11 | Linde Air Prod Co | Process and apparatus for separating gas 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 |
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 |
DE1099564B (de) * | 1959-09-09 | 1961-02-16 | Linde S Eismaschinen Ag Zweign | Verfahren und Einrichtung zur Anreicherung von schwerersiedenden Stoffen bei der Zerlegung von Gasgemischen durch Tieftemperaturrektifikation |
DE1158534B (de) * | 1961-07-05 | 1963-12-05 | Inst Chemie Und Kaelteausruest | Verfahren zur Gewinnung eines hochkonzentrierten Krypton-Xenon-Gemisches |
JPS5743186A (en) * | 1980-08-29 | 1982-03-11 | Nippon Oxygen Co Ltd | Production of krypton and xenon |
GB8610766D0 (en) * | 1986-05-02 | 1986-06-11 | Colley C R | Yield of krypton xenon in air separation |
GB2453141A (en) * | 2007-09-27 | 2009-04-01 | Hd Inspiration B V | Method of forming a visor |
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 |
-
0
- BE BE403024D patent/BE403024A/xx unknown
- BE BE391302D patent/BE391302A/xx unknown
- NL NL39016D patent/NL39016C/xx active
- NL NL42092D patent/NL42092C/xx active
- FR FR743380D patent/FR743380A/fr not_active Expired
-
1931
- 1931-11-14 DE DEG81157D patent/DE566151C/de not_active Expired
-
1932
- 1932-09-09 DE DEG83534D patent/DE629297C/de not_active Expired
- 1932-09-22 ES ES0127972A patent/ES127972A1/es not_active Expired
- 1932-09-24 US US634779A patent/US1963809A/en not_active Expired - Lifetime
- 1932-09-26 GB GB26710/32A patent/GB390069A/en not_active Expired
-
1933
- 1933-05-14 DE DEG85530D patent/DE631639C/de not_active Expired
- 1933-09-07 GB GB24841/33A patent/GB413518A/en not_active Expired
-
1934
- 1934-05-04 FR FR44782D patent/FR44782E/fr not_active Expired
- 1934-05-07 GB GB13802/34A patent/GB438196A/en not_active Expired
- 1934-05-09 US US724821A patent/US2060940A/en not_active Expired - Lifetime
-
1935
- 1935-03-20 DE DEG90034D patent/DE641715C/de not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2480093A (en) * | 1943-05-27 | 1949-08-23 | Air Prod Inc | Method of and apparatus for pumping liquid oxygen |
US2464891A (en) * | 1943-08-28 | 1949-03-22 | Linder Air Products Company | Process of and apparatus for producing compressed oxygen |
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 |
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 |
US3779028A (en) * | 1970-10-12 | 1973-12-18 | British Oxygen Co Ltd | Improved krypton xenon recovery method |
US3751934A (en) * | 1970-11-10 | 1973-08-14 | K Frischbier | Concentrating krypton and xenon in air separation by liquid oxygen wash |
JP2004205203A (ja) * | 2002-12-12 | 2004-07-22 | Air Products & Chemicals Inc | クリプトン及び/又はキセノンの回収方法及び装置 |
Also Published As
Publication number | Publication date |
---|---|
NL42092C (fr) | |
GB413518A (en) | 1934-07-19 |
GB438196A (en) | 1935-11-07 |
BE403024A (fr) | |
GB390069A (en) | 1933-03-30 |
DE629297C (de) | 1936-04-27 |
FR44782E (fr) | 1935-04-06 |
NL39016C (fr) | |
US2060940A (en) | 1936-11-17 |
DE566151C (de) | 1932-12-16 |
FR743380A (fr) | 1933-03-29 |
DE641715C (de) | 1937-02-11 |
DE631639C (de) | 1936-06-24 |
ES127972A1 (es) | 1932-11-01 |
BE391302A (fr) |
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