A selective hydrogenation catalyst for the seletive hydrogenation of
unsaturated hydrocarbons, a process for preparing this catalyst and its
use. The catalyst of the invention comprises a support, active component
Pd, rare earth metals, and auxiliary metal Bi, Ag etc. The catalyst is
able to hydrogenate high-unsaturated hydrocarbons such as alkyne with high
selectivity at high space velocity while both green oil formation and
carbon deposition on the catalyst are very low. It is applicable to an
industrial cracking process.
