Catalytic hydrogenation process and a catalyst for use in the pr

Details Catalytic hydrogenation process and a catalyst for use in the pr Catalytic hydrogenation process and a catalyst for use in the pr

1997-02-28

1999-03-30

Yildirim, Bekir L.

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is contaminant in desired hydrocarbon

585259, 502328, C07C 509, B01J 2104, B01J 2358, B01J 2344

Patent

active

058891870

ABSTRACT:
A process for the selective hydrogenation in the gas phase of acetylene compounds containing 2 or 3 carbon atoms to the corresponding ethylene compounds is described. The process uses a catalyst in the form of spherules or extrudates containing palladium, at least one group IB metal, optionally at least one alkaline or alkaline-earth metal and alumina, in which at least 80% of the palladium and at least 80% of the group IB element are present in a volume at the periphery of the catalyst defined between a spherical or cylindrical surface of radius r.sub.1 corresponding to the average spherule or extrudate diameter and a spherical or cylindrical surface of radius r.sub.2 at least equal to 0.8r.sub.1. More particularly, the catalyst comprises an alumina, palladium in a proportion of 0.01% to 0.5% by weight, and group IB metal in a proportion of 0.001 to 0.02% by weight, with a weight ratio of group IB metal/palladium of 0.05 to 0.25.

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