Method of liquefaction of natural gas

Details Method of liquefaction of natural gas Method of liquefaction of natural gas

1992-09-30

1994-03-08

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 28, 62 40, F25J 300

Patent

active

052917363

ABSTRACT:
A method of liquefying natural gas, wherein the gas (1) is cooled and separated into a liquid phase (6) and a gaseous phase (8) which is expanded (9) and added to the liquid phase in the column (7), at the head of which the gas enriched with methane (21) is separated and recompressed (27) and carried to the liquefaction (32, 33, 34) whereas the liquid phase from the bottom of column (7) is expanded and rectified in column (14); the head effluent (19) being condensed (20) and conveyed as a reflux (25) to column (7); the pressure in column (7) being higher than that of column (14); the C.sub.3 + hydrocarbons from the bottom (16) being separated and the methane liquefaction (33, 34) being conventional.

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