Hydrocarbon gas processing

Details Hydrocarbon gas processing Hydrocarbon gas processing

1977-10-18

1979-06-12

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 23, 62 38, F25J 302

Patent

active

041579046

ABSTRACT:
A process for separating hydrocarbon gases is described for the recovery of gases such as ethane and heavier hydrocarbons from natural gas streams or similar refinery or process streams. In the process described, the gas to be separated is cooled at a high pressure to produce partial condensation. The liquid from the partial condensation is further cooled and then expanded to a lower pressure. At the lower pressure, the liquid is then separated into fractions in a distillation column. The basic separation process is improved by combining the condensed high-pressure liquid with a stream having a lower bubble point, with cooling of one or both streams prior to expansion.

REFERENCES:
patent: RE25193 (1962-07-01), Schilling et al.
patent: 2964914 (1960-12-01), Schuftan et al.
patent: 3277655 (1978-10-01), Geist et al.
patent: 3292380 (1966-12-01), Bucklin
patent: 3292381 (1966-12-01), Bludworth
patent: 3360944 (1968-01-01), Knapp et al.
patent: 3433026 (1969-03-01), Swearingen
patent: 3626448 (1971-12-01), Crawford
patent: 3808826 (1974-05-01), Harper et al.

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