Process for liquefied natural gas

Details Process for liquefied natural gas Process for liquefied natural gas

1982-05-10

1984-05-01

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 28, 62 29, 62 31, 62 34, 62 43, F25J 102

Patent

active

044459173

ABSTRACT:
A process is disclosed for producing a purified liquefied natural gas (LNG) from a raw natural gas feed containing methane and hydrocarbon impurities of C.sub.2 and higher wherein the raw feed is cooled, distilled to remove impurities, and liquefied, such that the distillation reflux is supplied by a portion of a subcooled methane-rich liquid stream exiting the middle bundle of a three bundle main cryogenic heat exchanger having a mixed cryogenic refrigerant. The raw feed is cooled in the first bundle of said main exchanger.

REFERENCES:
patent: 3747359 (1973-07-01), Streich
patent: 4331461 (1982-05-01), Kabosky et al.

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