Process for separation of hydrocarbon gases

Details Process for separation of hydrocarbon gases Process for separation of hydrocarbon gases

1986-12-19

1987-12-08

Wayner, William E.

Refrigeration

Processes

Circulating external gas

62 23, 62 24, F25J 302

Patent

active

047116510

ABSTRACT:
A process for separation of a high pressure gas stream such as refinery gas in which the starting gas mixture is cooled and separated into a first vapor portion and a first liquid portion which is expanded to an intermediate pressure. The first vapor portion is further cooled and separated into a second vapor portion which may be further processed for ultimate recovery of, for example, a methane-rich product gas and a second liquid portion which is expanded to essentially the same intermediate pressure and combined with the expanded first liquid portion. The resulting mixed intermediate pressure stream or a portion thereof is then employed as refrigerant.

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