Patent ID: 7288686

Claim:
A process for the selective hydrogenation of unsaturated compounds comprising contacting a feed containing unsaturated compounds comprising acetylenes, diolefins and olefins in at least partial liquid phase with hydrogen in the presence of a catalyst for the selective hydrogenation of unsaturated compounds comprising Pd or a Group 8 metal component comprising Pd and one other Group 8 metal, Ag in the range of 0.005 to 5% by weight, Zn in the range of 0.002 to 1% by weight and Bi in the range of 0.01 to 3% by weight to selectively hydrogenate acetylenes, diolefins, or olefins supported on shaped transition alumina having an apparent bulk density of between 0.7-0.8 g/cm 3 and having mixed crystalline forms of α, κ, θ, δ, ρ, η, γ, and χ, which is highly porous having average pore diameter larger than about 180Å, no pores narrower than 35 Å, total pore volume larger than about 0.65 cc/g, and BET surface area of 20 to 70 m 21 /g.