Abstract: There is described a catalyst composition suitable in the hydrogenation of, for example, dripolenes, which consists essentially of palladium, or platinum metal dispersed on e.g., an alpha-alumina support, said support possessing the following characteristics:A. a porosity of about 0.1 cubic centimeter to about 0.8 cubic centimeter per gram of support;B. a surface area of about 0.1 square meter to about 10 square meters per gram of support; andC. an average pore size of about 0.05 micron to about 100 microns, a major proportion of the pores having a pore size in the range of about 0.05 micron to about 10 microns, wherein the amount of palladium dispersed on the surface of the support is about 0.01 per cent to about 1.0 per cent by weight of metal based on the weight of the catalyst composition, and the amount of platinum dispersed on the surface of the support is about 0.02 per cent to about 2.0 per cent by weight of metal based on the weight of the catalyst composition; and wherein at least about 7.