Patent ID: 6297414
Filing Date: 2001-10-02
Classification: C07C,C10G

Abstract:
A process for hydrogenating acetylenes and dienes in a gas stream comprising ethylene, propylene, hydrogen, methane, ethane, acetylene, methyl acetylene and propadiene, said process comprising the steps of:(a) partially hydrogenating said gas stream to hydrogenate essentially all of the acetylenes and reducing the propadiene content to less than about 500 ppmv to produce a partially hydrogenated gas stream;(b) partially demethanizing the partially hydrogenated gas stream to remove at least about 80% of the methane and reduce the hydrogen concentration to less than about 5000 ppmv to produce a partially demethanized stream; and(c) further hydrogenating said partially demethanized stream in a finishing reactor system to hydrogenate essentially all of the propadiene contained in said partially demethanized stream to produce a finished hydrogenated stream.