Process for liquefaction of natural gas

Details Process for liquefaction of natural gas Process for liquefaction of natural gas

1977-05-16

1979-04-03

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 18, 62 26, F25J 306

Patent

active

041475259

ABSTRACT:
A continuous process for the liquefaction of natural gas in which as a first step in the process the pressure of the gas is regulated to an input pressure in excess of 800 PSIG. The gas is then cooled at the input pressure to a temperature of the order of about 0.degree. F. in a primary cooling step. The gas is then expanded in a primary expansion step to reduce the pressure to 600 PSIG or less at a temperature of about 100.degree. F. The gas is again cooled in a further cooling step at a pressure of 600 PSIG or less to the critical temperature of the gas and thereafter the gas is expanded in a secondary expansion step to liquefy the gas at the convenient holding pressure for storage. This process provides for the cooling of the gas in a manner which permits re-circulated cooled gas to be used as the cooling medium in the heat exchangers.

REFERENCES:
patent: 2557171 (1951-06-01), Bodle et al.
patent: 2582148 (1952-01-01), Nelly, Jr.

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