Process for recovering olefins

Details Process for recovering olefins Process for recovering olefins

C - Chemistry, Metallurgy

10

G

C10G 70/04 (2006.01) C01B 3/50 (2006.01) C01B 3/56 (2006.01) C07C 7/144 (2006.01) F25J 3/02 (2006.01)

Patent

CA 2316309

A process for recovering olefins from a gas stream containing olefins and hydrogen. The process comprises compressing the gas stream in at least one compression stage to form a compressed gas stream, contacting the compressed gas stream 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.

L'invention concerne un procédé de récupération d'oléfines à partir d'un flux gazeux renfermant des oléfines et de l'hydrogène. Le procédé consiste à comprimer le flux gazeux, au cours d'une opération de compression au moins, de manière à former un flux gazeux comprimé; à mettre le flux gazeux comprimé au contact d'une membrane dans des conditions satisfaisantes pour obtenir un flux de perméat riche en hydrogène et un flux de retentat appauvri en hydrogène; et à introduire le flux de perméat dans un système d'adsorption modulée en pression dans des conditions satisfaisantes pour obtenir un flux non adsorbé riche en hydrogène et un flux désorbé renfermant des oléfines.

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