Catalyst for the selective hydrogenation of alkynes and dienes in mixtures of c2-c5 + olefins, and processes for their preparation, and, for the selective hydrogenation of alkynes and dienes in mixtures of c2-c5 + olefins

摘要

"CATALYST FOR THE SELECTIVE HYDROGENATION OF ALKINES AND DIENES IN C2-C5 ^ + ^ OLEFINES MIXTURES, AND PROCESSES FOR THE PREPARATION OF THE SAME, AND, FOR THE SELECTIVE HYDROGENATION OF ALKINES AND DIENES IN MIXTURES OF OLEFINES ^" . A catalyst for the selective hydrogenation of alkynes and dienes in mixtures of C2-C5 ^ + ^ olefins is described. These catalysts contain (a) a metal from the eleventh group of the Periodic Table, (b) a metal from the eleventh group of the Periodic Table and (c) if required, a metal compound from the first or second group of the Periodic Table, these metals being applied to a support that is selected from the group consisting of silica, titanium dioxide, zirconium oxides, spinels, zinc aluminates, zinc titanates or mixtures of these substances, and the eleventh group metal being homogeneously distributed over the cross section of the catalyst particle and the metal of the tenth group being present in an edge layer close to the surface of the catalyst particle. This catalyst is prepared by applying the metal of the eleventh group, preferably during the preparation of the support itself, by impregnation with a solution of an appropriate metal salt.