Refrigeration – Cryogenic treatment of gas or gas mixture – Liquefaction
Reexamination Certificate
2007-12-18
2007-12-18
Doerrler, William C (Department: 3744)
Refrigeration
Cryogenic treatment of gas or gas mixture
Liquefaction
Reexamination Certificate
active
11375425
ABSTRACT:
Method gas liquefaction which comprises cooling a feed gas stream successively through at least two heat exchange zones, wherein cooling is provided by respective vaporizing refrigerants, and wherein the refrigerant in the coldest temperature range is only partially vaporized in the coldest heat exchange zone and then is vaporized in a further heat exchange zone at temperatures above the highest temperature of the coldest heat exchange zone to form a totally vaporized refrigerant. The totally vaporized refrigerant is compressed to yield a compressed refrigerant stream, and the entire compressed refrigerant stream is either(i) cooled by indirect heat exchange in the further heat exchange zone, thereby providing self-refrigeration for the recirculating refrigeration process, or(ii) cooled in a heat exchange zone preceding the coldest heat exchange zone by indirect heat exchange with a respective vaporizing refrigerant and then further cooled the in the further heat exchange zone.
REFERENCES:
patent: 3315477 (1967-04-01), Carr
patent: 3413816 (1968-12-01), De Marco
patent: 4033735 (1977-07-01), Swenson
patent: 4057972 (1977-11-01), Sarsten
patent: 4094655 (1978-06-01), Krieger
patent: 4112700 (1978-09-01), Forg
patent: 4274849 (1981-06-01), Garier
patent: 4334902 (1982-06-01), Paradowski
patent: 4755200 (1988-07-01), Liu
patent: 5791160 (1998-08-01), Mandler
patent: 6119479 (2000-09-01), Roberts
patent: 6250105 (2001-06-01), Kimble
patent: 6253574 (2001-07-01), Stockmann
patent: 6308531 (2001-10-01), Roberts
patent: 6742357 (2004-06-01), Roberts
patent: 2003/0089125 (2003-05-01), Fredheim
patent: 2004/0065113 (2004-04-01), Paradowski
patent: A-43493/85 (1985-12-01), None
patent: 3521060 (1985-12-01), None
patent: 199 37 623 (2001-02-01), None
patent: 1572900 (1980-08-01), None
Air Products and Chemicals Inc.
Doerrler William C
Jones II Willard
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