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Title: US6425263: Apparatus and process for the refrigeration, liquefaction and separation of gases with varying levels of purity
[ Derwent Title ]


Country: US United States of America

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19 pages

 
Inventor: Bingham, Dennis N.; Idaho Falls, ID
Wilding, Bruce M.; Idaho Falls, ID
McKellar, Michael G.; Idaho Falls, ID

Assignee: The United States of America as represented by the Department of Energy, Washington, DC
other patents from UNITED STATES OF AMERICA, DEPARTMENT OF ENERGY (597195) (approx. 6,712)
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Published / Filed: 2002-07-30 / 2001-08-23

Application Number: US2001000643420

IPC Code: Advanced: F25J 1/00; F25J 3/00; F25J 3/06;
IPC-7: F25J 1/00;

ECLA Code: F25J1/00; F25J1/00A6; F25J1/00A6B; F25J1/00C2E; F25J1/00C2E2; F25J1/00C2F; F25J1/00C2V; F25J1/02A; F25J1/02A2; F25J1/02Z4U; R25J205/10; R25J220/62; R25J220/64; R25J230/08; R25J230/30; R25J230/60; R25J245/02; R25J290/62;

U.S. Class: 062/613; 062/619;

Field of Search: 062/611,613,619,621,87,910,5

Government Interest:

CONTRACTUAL ORIGIN OF THE INVENTION
    This invention was made with United States Government support under Contract No. DE-AC07-94ID13223, now Contract No. DE-AC07-99ID13727 awarded by the United States Department of Energy. The United States Government has certain rights in the invention.

Priority Number:
2001-08-23  US2001000643420
1992-12-16  US1992000212490
1997-12-16  US1997000069698P

Abstract:     A process for the separation and liquefaction of component gasses from a pressurized mix gas stream is disclosed. The process involves cooling the pressurized mixed gas stream in a heat exchanger so as to condensing one or more of the gas components having the highest condensation point; separating the condensed components from the remaining mixed gas stream in a gas-liquid separator; cooling the separated condensed component stream by passing it through an expander; and passing the cooled component stream back through the heat exchanger such that the cooled component stream functions as the refrigerant for the heat exchanger. The cycle is then repeated for the remaining mixed gas stream so as to draw off the next component gas and further cool the remaining mixed gas stream. The process continues until all of the component gases are separated from the desired gas stream. The final gas stream is then passed through a final heat exchanger and expander. The expander decreases the pressure on the gas stream, thereby cooling the stream and causing a portion of the gas stream to liquify within a tank. The portion of the gas which is hot liquefied is passed back through each of the heat exchanges where it functions as a refrigerant.

Primary / Asst. Examiners: Capossela, Ronald;

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Related Applications:
Application Number Filed Patent Pub. Date  Title
US1992000212490 1992-12-16    2000-08-22  Apparatus and process for the refrigeration, liquefaction and separation of gases with varying levels of purity


       
Parent Case:

RELATED APPLICATION
    This application is a continuation application of United States application S/N 09/212,490 filed Dec. 16, 1992, and which claims priority to provisional application S/N 60/069,698, filed Dec. 16, 1997, now U.S. Pat. No. 6,105,390.

Designated Country: AL AM AP AT AZ BA BB BG BR BY CH CN CU CZ EA EE ES FI GD GE GH GM HR HU ID IL IN IS KE KG  BE DE DK FR GB IT 

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First Claim:
Show all 12 claims
We claim:     1. A process for producing a purified methane stream comprising separating and cooling a pressurized feed mixed gas stream containing a methane component and one or more hydrocarbon components heavier that methane, wherein the latent energy of each individual, separated component is captured by the process to further cool the pressurized mixed gas stream, the process comprising the steps of:
  • (a) cooling the mixed gas stream in a feed cooling heat exchange zone;
  • (b) further cooling, condensing, and purifying the cooled mixed gas stream of step (a) to produce a cold methane vapor product and a hydrocarbon liquid enriched in one or more hydrocarbons heavier than methane;
  • (c) separating the cold methane vapor product from the hydrocarbon liquid; and
  • (d) vaporizing at least a portion of the hydrocarbon liquid of step (b) in the feed cooling heat exchange zone to provide by indirect heat exchange at least a portion of the refrigeration required to cool the mixed gas stream in the feed cooling heat exchange zone m step (a), and withdrawing a vaporized hydrocarbon product from the feed cooling heat exchange zone.


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Forward References: Show 7 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (7)   |   Backward references (32)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 3pp US2209534* 1940-07 Moore    
Get PDF - 4pp US2494120* 1950-01 Ferro    
Get PDF - 18pp US2937503  1960-06 Swearingen et al.   Turbo-expander-compressor units
Get PDF - 5pp US3292380  1966-12 Bucklin   Method and equipment for treating hydrocarbon gases for pressure reduction and condensate recovery
Get PDF - 7pp US3362173  1968-01 Kniel   Liquefaction process employing cascade refrigeration
Get PDF - 6pp US3416324  1968-12 Swearingen   Liquefaction of a gaseous mixture employing work expanded gaseous mixture as refrigerant
Get PDF - 6pp US3548606  1970-12 Kuertson   SERIAL INCREMENTAL REFRIGERANT EXPANSION FOR GAS LIQUEFACTION
Get PDF - 4pp US3596473  1971-08 Streich  Messer Griescheim GmbH LIQUEFACTION PROCESS FOR GAS MIXTURES BY MEANS OF FRACTIONAL CONDENSATION
Get PDF - 4pp US3628340  1971-12 Meisler et al.  Hydrocarbon Research, Inc. PROCESS FOR CRYOGENIC PURIFICATION OF HYDROGEN
Get PDF - 15pp US3724226  1973-04 Pachaly  Gulf Research & Development Company LNG EXPANDER CYCLE PROCESS EMPLOYING INTEGRATED CRYOGENIC PURIFICATION
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Get PDF - 5pp US5390499  1995-02 Rhoades et al.  Liquid Carbonic Corporation Process to increase natural gas methane content
Get PDF - 8pp US5450728  1995-09 Vora et al.  Air Products and Chemicals, Inc. Recovery of volatile organic compounds from gas streams
Get PDF - 7pp US5505048  1996-04 Ha et al.   Method and apparatus for the separation of C4 hydrocarbons from gaseous mixtures containing the same
Get PDF - 6pp US5511382  1996-04 Denis et al.  L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude Process and installation for the cryogenic purification of hydrogen
Get PDF - 14pp US5537827  1996-07 Low et al.   Method for liquefaction of natural gas
Get PDF - 10pp US5600969  1997-02 Low  Phillips Petroleum Company Process and apparatus to produce a small scale LNG stream from an existing NGL expander plant demethanizer
Get PDF - 17pp US5615561  1997-04 Houshmand et al.  Williams Field Services Company LNG production in cryogenic natural gas processing plants
Get PDF - 8pp US5655388  1997-08 Bonaquist et al.  Praxair Technology, Inc. Cryogenic rectification system for producing high pressure gaseous oxygen and liquid product
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Get PDF - 24pp US5718126  1998-02 Capron et al.  Institut Francais du Petrole Process and device for liquefying and for processing a natural gas
Get PDF - 6pp US5755114  1998-05 Foglietta  ABB Randall Corporation Use of a turboexpander cycle in liquefied natural gas process
Get PDF - 6pp US5836173  1998-11 Lynch et al.  Praxair Technology, Inc. System for producing cryogenic liquid
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Foreign References:
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Publication Date IPC Code Assignee   Title
  DE88100936 1988-02       


Other Abstract Info: CHEMABS 131(03)033493Q DERABS C1999-405052

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