US Patent 7816571 Selective hydrogenation process using layered catalyst composition

The use of a layered catalyst composition to selectively hydrogenate C5-C11 diolefins in a hydrocarbon mixture to one or more respective C5-C11 monoolefins is disclosed. The layered catalyst comprises an inner core having a first inorganic oxide and an outer layer bonded to the inner core. The outer layer has a non-refractory second inorganic oxide with at least one Group 1-2 metal and at least one Group 8-10 metal dispersed thereon.