Luc H Garcia, 75Hayward, CA
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Oakland, CA
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Us Patents
Method Of Liquefying Natural Gas
US Patent:
5036671, Aug 6, 1991
Filed:
Feb 6, 1990
Appl. No.:
7/475908
Inventors:
Warren L. Nelson - Orinda CA
Luc Garcia - San Francisco CA
Luc Garcia - San Francisco CA
Assignee:
Liquid Air Engineering Company - Montreal
International Classification:
F25J 306
US Classification:
62 23
Abstract:
A method of producing a methane-rich liquid stream from a stream of natural gas predominantly consisting of methane and also containing nitrogen, entailing: (a) supplying said natural gas stream at a pressure above atmospheric pressure, (b) cooling and liquefying said natural gas stream using one or more refrigeration cycles, and (c) expanding said liquefied natural gas to lower pressure in two or more stages in series, phase separating the gas and liquid phases produced during the expansion, thereby concentrating the nitrogen into the vapor phase, and producing a methane-rich liquefied natural gas.
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