Process for devolatilizing natural gas liquids

Details Process for devolatilizing natural gas liquids Process for devolatilizing natural gas liquids

1985-01-17

1985-12-17

Sever, Frank

Refrigeration

Processes

Circulating external gas

55 68, F25J 302

Patent

active

045590702

ABSTRACT:
A natural gas liquid which has been cryogenically extracted from a natural gas feed is devolatilized by removing a portion of the ethane from the liquid. The natural gas feed stream is initially split into two streams, the smaller part of the stream being fed to the bottom of a demethanizing absorber at a low temperature and the larger part of the stream being fed to the top of the absorber at a substantially lower cryogenic temperature. A methane-rich gas product is recovered from the top of the absorber while the methane-lean liquid in the bottom of the absorber is fed to a non-cryogenic deethanizer. A portion of the volatiles in the methane-lean liquid are removed in the deethanizer leaving a devolatilized natural gas liquid product.

REFERENCES:
patent: 3292380 (1966-12-01), Bucklin
patent: 4421535 (1983-12-01), Mehra
patent: 4509967 (1985-04-01), Sweet

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