Process for recovering olefins from cracked gases

Details Process for recovering olefins from cracked gases Process for recovering olefins from cracked gases

1997-12-16

1999-11-09

Capossela, Ronald

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62908, 62932, 62935, 95 55, F25B 100

Patent

active

059791780

ABSTRACT:
A process for recovering olefins from a cracking effluent containing olefins and hydrogen. The process comprises compressing the cracking effluent in at least one compression stage to form a compressed cracking effluent, contacting the compressed cracking effluent with a membrane at conditions effective to obtain a permeate stream rich in hydrogen and a retentate stream depleted in hydrogen, and introducing the permeate stream into a pressure swing adsorption system at conditions effective to obtain a nonadsorbed stream rich in hydrogen and a desorbed stream comprising olefins.

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patent: 5085774 (1992-02-01), Ekiner et al.
patent: 5332424 (1994-07-01), Rao et al.
patent: 5452581 (1995-09-01), Dinh et al.
patent: 5634354 (1997-06-01), Howard et al.

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