Catalyst comprising palladium and its application in selective hydrogenation

摘要

The invention concerns a catalyst comprising a porous support, palladium, at least one metal selected from the group constituted by alkalis and alkaline-earths, in which:the specific surface area of the porous support is in the range 50 to 210 m²/g;the palladium content in the catalyst is in the range 0.05% to 2% by weight;at least 80% by weight of the palladium is distributed in a crust at the periphery of the support, the thickness of said crust being in the range 20 to 200 μm;the metallic dispersion D is in the range 25% to 70%;the density of the palladium particles in the crust is in the range 1500 to 4100 particles of palladium per μm²;and said alkali and/or alkaline-earth metal is distributed homogeneously across the support.;The invention also concerns the preparation of the catalyst and its use in selective hydrogenation.