Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Reexamination Certificate
2007-12-25
2007-12-25
Caldarola, Glenn (Department: 1764)
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
C062S618000, C062S621000, C062S622000
Reexamination Certificate
active
10942842
ABSTRACT:
An apparatus and process for separating a feed liquefied natural gas containing at least methane and a hydrocarbon less volatile the methane, into a product natural gas enriched with methane and lean in hydrocarbon less volatile than methane and a heavier fraction lean in methane and enriched with hydrocarbon less volatile than methane. The process includes heating the feed liquefied natural gas in a heat exchanger, passing the heated fluid into a distillation column, withdrawing the heavier fraction from a bottom of the column, and withdrawing a residue gas from a top of the column. The process also includes liquefying at least part of the residue gas in the heat exchanger, refluxing a part of the liquid portion of the fluid obtained in the liquefying step into the column, and withdrawing, as the product narutal gas, the remainder of the liquid portion.
REFERENCES:
patent: 2952984 (1960-09-01), Marshall
patent: 3837172 (1974-09-01), Markbreiter et al.
patent: 5114451 (1992-05-01), Rambo et al.
patent: 6510706 (2003-01-01), Stone et al.
patent: 6564579 (2003-05-01), McCartney
patent: 6564580 (2003-05-01), Bowen et al.
patent: 6604380 (2003-08-01), Reddick et al.
patent: 6907752 (2005-06-01), Schroeder et al.
patent: 2003/0158458 (2003-08-01), Prim
Dan McCartney, “Gas Conditioning for Imported LNG”, 82ndAnnual Convention Gas Processors Association, Mar. 11, 2002, 11 pages.
C.C. Yang, et al., “Cost-Effective Design Reduces C2and C3at LNG Receiving Terminals”, Oil & Gas Journal, May 26, 2003, pp. 50-53.
J. Mak, et al., “LNG Flexibility”, Hydrocarbon Engineering, Oct. 2003, pp. 26, 28, 30 and 32.
Kumar Akhilesh
Ohara Susumu
Yamaguchi Shoichi
Yoshida Nobuhiro
Boyer Randy
Caldarola Glenn
Toyo Engineering Corporation
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