US20060218967A1 - Integrated process and apparatus for the separation of air - Google Patents
Integrated process and apparatus for the separation of air Download PDFInfo
- Publication number
- US20060218967A1 US20060218967A1 US11/123,407 US12340705A US2006218967A1 US 20060218967 A1 US20060218967 A1 US 20060218967A1 US 12340705 A US12340705 A US 12340705A US 2006218967 A1 US2006218967 A1 US 2006218967A1
- Authority
- US
- United States
- Prior art keywords
- natural gas
- air separation
- separation unit
- conduit
- unit
- 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.)
- Abandoned
Links
- 238000000926 separation method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003345 natural gas Substances 0.000 claims abstract description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims 2
- 238000007254 oxidation reaction Methods 0.000 claims 2
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 1
Images
Classifications
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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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
- F25J1/0025—Boil-off gases "BOG" from storages
-
- 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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0221—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using the cold stored in an external cryogenic component in an open refrigeration loop
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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
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
- F25J1/0234—Integration with a cryogenic air separation unit
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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
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04109—Arrangements of compressors and /or their drivers
- F25J3/04115—Arrangements of compressors and /or their drivers characterised by the type of prime driver, e.g. hot gas expander
- F25J3/04121—Steam turbine as the prime mechanical driver
-
- 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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04527—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general
- F25J3/04539—Integration with an oxygen consuming unit, e.g. glass facility, waste incineration or oxygen based processes in general for the H2/CO synthesis by partial oxidation or oxygen consuming reforming processes of fuels
-
- 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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04563—Integration with a nitrogen consuming unit, e.g. for purging, inerting, cooling or heating
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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
- F25J3/04521—Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes
- F25J3/04612—Heat exchange integration with process streams, e.g. from the air gas consuming unit
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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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/42—Nitrogen
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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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
- F25J2240/12—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being nitrogen
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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
- F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
- F25J2260/42—Integration in an installation using nitrogen, e.g. as utility gas, for inerting or purging purposes in IGCC, POX, GTL, PSA, float glass forming, incineration processes, for heat recovery or for enhanced oil recovery
- F25J2260/44—Integration in an installation using nitrogen, e.g. as utility gas, for inerting or purging purposes in IGCC, POX, GTL, PSA, float glass forming, incineration processes, for heat recovery or for enhanced oil recovery using nitrogen for cooling purposes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
In an integrated process for separation of air, an air separation unit produces a stream enriched in oxygen and a stream enriched in nitrogen, the stream enriched in nitrogen is used to liquefy vaporized natural gas by indirect heat exchange and the stream enriched in oxygen is sent to a natural gas treatment unit.
Description
- It would be more efficient to reliquefy the low pressure vapors independently of the liquefier.
- According to the invention, a fluid rich in nitrogen generated by the air separation unit (ASU) is used to liquefy the vapors. The same ASU produces oxygen for the reformer process. The ASU has an air compressor which may be driven by steam turbine, using steam from the reformer and/or the synthesis gas process.
- The fluid rich in nitrogen may be in liquid form and may be vaporised to condense the vapors of natural gas at low pressure. Alternatively the fluid may be is the form of pressurised gas and may be expanded producing external work to produce a gaseous nitrogen rich stream or a stream which is dual phase, the stream being at a low enough temperature to condense the natural gas vapors.
- In this way, a single ASU provides different fluids for different applications on the same site. The energy costs of the liquefaction of natural gas are reduced since no natural gas need be combusted to produce the energy required.
- Air is compressed in a compressor 1, cooled and purified to form
feed stream 3 and sent toair separation unit 100. The air separation unit is of any known kind but in particular may be a cryogenic distillation unit comprised of a single column, a double column or a triple column. The air separation unit produces aliquid nitrogen stream 7 which is sent to aheat exchanger 11 where it exchanges heat with astream 4 of vaporised natural gas at a pressure of less than 3 bars abs. from a tanker-loading bay 400. The vaporisednatural gas 4 is thereby liquefied and returned to theloading bay 400. The air separation unit also produces agaseous nitrogen stream 9 which is cooled by expanding the gas in a turbine to form a cooled gaseous stream or a dual phase stream. The cooled stream or dual phase stream is sent to aheat exchanger 13 where it is used to liquefy vaporised natural gas coming from the storage tanks of aliquefaction unit 500. The liquefiednatural gas 15 is returned to the storage tanks of theliquefaction unit 500. Liquefied natural gas is preferably sent from theliquefaction unit 500 to the tanker-loading bay 400. -
Oxygen 24 from the air separation unit is sent in gaseous form to areformer 200 which is also fed bynatural gas 29. Steam 21 produced using the heat generated in thereformer 200 is used to feed asteam turbine 19. - Also present on the site may be a natural gas conversion unit 300 which converts natural gas 27 to synthesis gas. Heat generated by this exothermic reaction may be used to raise steam 23 to be sent to steam turbine 17.
- The air compressor 1 may receive power from either or both of
steam turbines 17 and 19.
Claims (9)
1-8. (canceled)
9. A method which may be used for separating air, said method comprising:
a) producing an oxygen enriched stream in an air separation unit;
b) producing a nitrogen enriched stream in said air separation unit;
c) liquefying vaporized natural gas by indirect heat exchange with said nitrogen enriched stream; and
d) sending said oxygen enriched stream to a natural gas treatment unit.
10. The method of claim 9 , further comprising expanding said nitrogen enriched stream in a turbine prior to said liquefying.
11. The method of claim 9 , wherein said vaporized natural gas is liquefied at a pressure less than about 3 bar abs.
12. The method of claim 9 , wherein said treatment unit comprises at least one member selected from the group consisting of:
a) a natural gas reformer unit; and
b) a partial oxidation unit.
13. The method of claim 9 , further comprising compressing feed air for said air separation unit in a compressor, wherein:
a) power for said compressor is obtained from at least one steam turbine; and
b) said steam turbine is associated with said natural gas treatment unit.
14. An apparatus which may be used as an integrated air separation unit, said apparatus comprising:
a) an air separation unit;
b) a conduit for supplying said air separation unit with cooled compressed air;
c) a conduit for removing from said air separation unit a nitrogen enriched fluid;
d) a conduit for removing from said air separation unit an oxygen enriched fluid;
e) a heat exchanger for condensing vaporized natural gas;
f) at least one conduit for supplying vaporized natural gas to said heat exchanger;
g) at least one conduit for supplying said nitrogen enriched fluid to said heat exchanger;
h) at least one conduit for removing condensed natural gas from said heat exchanger;
i) at least one conduit for removing a cooled nitrogen enriched fluid from said heat exchanger; and
j) a conduit for supplying said oxygen enriched fluid to said natural gas treatment unit.
15. The apparatus of claim 14 , further comprising a turbine located downstream of said air separation unit and upstream of said heat exchanger.
16. The apparatus of claim 14 , wherein said natural gas unit comprises at least one member selected from the group consisting of:
a) a natural gas reformer; and
b) a natural gas partial oxidation unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/123,407 US20060218967A1 (en) | 2005-03-31 | 2005-05-06 | Integrated process and apparatus for the separation of air |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66689505P | 2005-03-31 | 2005-03-31 | |
US11/123,407 US20060218967A1 (en) | 2005-03-31 | 2005-05-06 | Integrated process and apparatus for the separation of air |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060218967A1 true US20060218967A1 (en) | 2006-10-05 |
Family
ID=37068727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/123,407 Abandoned US20060218967A1 (en) | 2005-03-31 | 2005-05-06 | Integrated process and apparatus for the separation of air |
Country Status (1)
Country | Link |
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US (1) | US20060218967A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150000523A1 (en) * | 2012-08-24 | 2015-01-01 | The Boeing Company | Aircraft fuel tank flammability reduction methods and systems |
US20170038137A1 (en) * | 2015-08-06 | 2017-02-09 | L'air Liquide, Societe Anonyme Pour L'etude Et I'exploitation Des Procedes Georges Claude | Method for the production of liquefied natural gas and nitrogen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507134A (en) * | 1983-06-02 | 1985-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Air fractionation method |
US4617036A (en) * | 1985-10-29 | 1986-10-14 | Air Products And Chemicals, Inc. | Tonnage nitrogen air separation with side reboiler condenser |
US4834785A (en) * | 1988-06-20 | 1989-05-30 | Air Products And Chemicals, Inc. | Cryogenic nitrogen generator with nitrogen expander |
US6568209B1 (en) * | 2002-09-06 | 2003-05-27 | Praxair Technology, Inc. | Cryogenic air separation system with dual section main heat exchanger |
-
2005
- 2005-05-06 US US11/123,407 patent/US20060218967A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507134A (en) * | 1983-06-02 | 1985-03-26 | Kabushiki Kaisha Kobe Seiko Sho | Air fractionation method |
US4617036A (en) * | 1985-10-29 | 1986-10-14 | Air Products And Chemicals, Inc. | Tonnage nitrogen air separation with side reboiler condenser |
US4834785A (en) * | 1988-06-20 | 1989-05-30 | Air Products And Chemicals, Inc. | Cryogenic nitrogen generator with nitrogen expander |
US6568209B1 (en) * | 2002-09-06 | 2003-05-27 | Praxair Technology, Inc. | Cryogenic air separation system with dual section main heat exchanger |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150000523A1 (en) * | 2012-08-24 | 2015-01-01 | The Boeing Company | Aircraft fuel tank flammability reduction methods and systems |
US9327243B2 (en) * | 2012-08-24 | 2016-05-03 | The Boeing Company | Aircraft fuel tank flammability reduction methods and systems |
US20170038137A1 (en) * | 2015-08-06 | 2017-02-09 | L'air Liquide, Societe Anonyme Pour L'etude Et I'exploitation Des Procedes Georges Claude | Method for the production of liquefied natural gas and nitrogen |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: L'AIR LIQUIDE, SOCIETE ANONYME A DIRECTOIRE ET CON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LE BOT, PATRICK;REEL/FRAME:016728/0816 Effective date: 20050616 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |