Method and device for liquefying a natural gas without phase sep

Details Method and device for liquefying a natural gas without phase sep Method and device for liquefying a natural gas without phase sep

1998-07-10

2000-08-22

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62619, F25J 100

Patent

active

061053899

ABSTRACT:
A method allowing a gaseous mixture such as a natural gas to be liquefied by using a first compressed coolant mixture M.sub.1, at least partially condensed by cooling with the aid of an external coolant fluid, then subcooled, expanded, and vaporized, and a second compressed coolant mixture, cooled with the aid of an external coolant fluid, then cooled by heat exchange with the first coolant mixture M.sub.1 during the first cooling stage (I), after which it is in an at least partially condensed state. The second partially condensed coolant mixture is sent without phase separation to a second cooling stage (II) where it is fully condensed, expanded, and vaporized at at least two pressure levels. The subcooled natural gas is expanded to form the LNG produced.

REFERENCES:
patent: 4256476 (1981-03-01), Van Baush
patent: 5651269 (1997-07-01), Prevost et al.
patent: 5701761 (1997-12-01), Prevost et al.
patent: 5826444 (1998-10-01), Capron et al.

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