Selective hydrogenation catalyst and process using this catalyst

摘要

The catalyst, of spherical or extruded shape, comprises palladium, at least a metal from group IB of the Periodic Table and alumina for selective hydrogenation. The ponderal ratio of the metal from group IB to palladium is 0.4-3.8% of palladium and 80% of the metal in group IB are present in a volume at a boundary of the catalyst defined by a cylindrical or spherical surface of radius r1 corresponding to the mean radius of the catalyst of spherical or extruded shape and by a cylindrical or spherical surface of radius r2 equals 0.8r1. Also claimed is the selective hydrogenation of acetylene (or ethylene) or hydrocarbons with 2-3C in a gas phase, comprising subjecting the acetylene (or ethylene) or hydrocarbon in a gas phase in the presence of hydrogen to hydrogenation using the above catalyst.