Process for recovering olefins
AssigneesAir Liquide America Corporation, L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsYves Engler, Gerard Dupuis
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Abstract
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.
Claims16
A process for recovering olefins from a gas stream containing olefins and hydrogen, said process comprising the steps of:
- (a) compressing said gas stream in at least one compression stage to form a compressed gas stream;
- (b) contacting said 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
- (c) introducing said 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.
A process for recovering olefins and high purity hydrogen from a gas stream containing the same, said process comprising the steps of:
- (a) compressing said gas stream in at least one compression stage to form a compressed gas stream;
- (b) contacting said compressed gas stream with a membrane at conditions effective to obtain a permeate stream rich in hydrogen and a retentate stream depleted in hydrogen;
- (c) compressing said permeate stream in at least one additional compression stage to form a compressed permeate stream;
- (d) introducing said compressed permeate stream into a pressure swing adsorption system at conditions effective to obtain a nonadsorbed stream comprising high purity hydrogen and a desorbed stream comprising olefins;
- and
- (e) recycling said desorbed stream to said at least one compression stage.
Dependencies are inferred from the claim text.