United States Steel Corporation

U.S. Steel Corporation

William E Hall

Howard H Morgan, Jr

George L Brownell

Arthur Snyder

A R Snyder

Melba Collier

Melba J Collier

Carbonyl sulfide is removed from propylene by hydrolysis over a catalyst comprising platinum sulfide on alumina. Specifically, the propylene is passed through, successively, a C.sub.3 -splitter, a heater, the platinum sulfide catalyst bed, and a topping still where the resulting H.sub.2 S and CO.sub.2 are separated from the purified propylene.

Method of removal of COS from propylene

In a method of removing carbonyl sulfide from propylene by hydrolysis over a catalyst comprising platinum sulfide on alumina, the improvement comprising regenerating the catalyst by contacting the catalyst with a solvent for polypropylene under conditions such that any polypropylene on the catalyst will be readily dissolved. Specifically, the propylene is passed through, successively, a C.sub.3 -splitter, a heater, the platinum sulfide catalyst bed, and a topping still where resulting H.sub.2 S and CO.sub.2 are separated from the purified propylene. A preferred solvent is liquid propylene.

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LaPorte, TX, United States of America

William E Hall