Method of activation of a nickel catalyst, and a process of selective hydrogenation of gasolines using this catalyst

摘要

A supported nickel metal catalyst which has been used in a process for the selective hydrogenation of gasolines from thermal cracking processes operated at above 593 DEG C., is reactivated by passing a stream of hydrogen containing gas at above 150 DEG C. without a previous catalyst oxidation step. Catalyst supports specified are oxides of Al, Ca, Sr, Ba and Mg; CaCO3, sepiolite, diatomaceous earths and firebrick derived therefrom, SiC, C, quartz and pumice. The hydrogenation process in which the catalyst is to be used is one to reduce the gum forming tendency of gasolines. Specification 899,652 is referred to.