Process of making supported catalyst

This patent describes a process of forming an impregnated supported catalyst in which the structure and activity of a Group VIII metal catalyst, supported on a metal oxide or composite metal oxide support, is altered by the presence of an additional metal ion selected from the group that consists of aluminum, silicon, and zirconium derived from the dissolution of the support or added externally using suitable metal salt precursors during impregnation, wherein the support has a particle size on the order of 40-80 mesh. It comprises co-impregnating the support with a solution consisting essentially of a precursors of the metal catalyst selected from the group consisting of chloroplatinic and chloroiridic acid and mixtures thereof and at the same time with a nitrate precursor of the additional metal, and calcining at an elevated temperature the support impregnated with the precursors of the metal catalysts and the additional metal to produce the supported catalyst