Preparation of alkenes by partial hydrogenation of alkynes...

Details Preparation of alkenes by partial hydrogenation of alkynes... Preparation of alkenes by partial hydrogenation of alkynes...

C - Chemistry, Metallurgy

07

C

C07C 33/025 (2006.01) B01J 23/44 (2006.01) B01J 37/02 (2006.01) C07C 5/09 (2006.01) C07C 29/17 (2006.01) C07C 35/17 (2006.01) C07C 41/50 (2006.01) C07C 43/303 (2006.01) C07C 213/08 (2006.01) C07C 215/24 (2006.01) C07D 309/12 (2006.01) C07J 1/00 (2006.01)

Patent

CA 2181274

Alkenes are prepared by partial hydrogenation of alkynes in the liquid phase over palladium catalysts by a process which com- prises A. using a fixed-bed catalyst which is obtainable by heating the preferably metallic carrier in the air, cooling, coating un- der reduced pres3ure with metallic palladium, suitable mold- lng and proces3ing to a monolithic catalyst elements and B. adding from 10 to 180 ppm of CO to the hydrogen used for the hydrogenation .

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