Patent ID: 8013197

Claim:
A method to remove acetylenic and diolefinic compounds from a monoolefinic stream and convert said acetylenic and diolefinic compounds into one or more monoolefinic compounds comprising: contacting the monoolefin stream which contains acetylenic and diolefinic components with an aprotic, liquid solvent in which the acetylenic and diolefinic compounds are more soluble than the olefinic components, thereby effecting separation of at least some of the acetylenic and diolefinic compounds from the monoolefinic stream, concentrating the acetylenic and diolefinic compounds in the liquid solvent to form an enriched solvent, and a lean monoolefin stream, which is reduced in acetylenic and diolefinic compounds content, introducing the enriched solvent to at least one reactor containing a supported catalyst comprising a Group VIII element, co-currently introducing a gas stream comprising at least hydrogen to the at least one reactor, operating the at least one reactor at conditions sufficient to maintain a portion of the acetylenic or diolefinic compounds within the liquid phase and to hydrogenate at least a portion of the acetylenic and diolefinic compounds contained within the enriched absorbent, preferentially to monoolefins, producing a reactor product stream comprising solvent, monoolefins and at least one selected from the group consisting of hydrogen and carbon monoxide, separating the reactor product stream into a solvent stream and a monoolefin product stream comprising monoolefins and at least one selected from the group consisting of hydrogen and carbon monoxide, introducing the monoolefin product stream into a first gas separation device configured to separate a monoolefin-enriched stream from a monoolefin-reduced stream, wherein the monoolefin-reduced stream comprises at least one selected from the group consisting of hydrogen and carbon monoxide, introducing the monoolefin-reduced stream into a second gas separation device configured for separation of hydrogen, carbon monoxide, or both from the monoolefin-reduced stream, and recycling at least one selected from the separated hydrogen and the separated carbon monoxide to the at least one reactor.