Patent ID: 7687429

Claim:
A process for preparing catalysts for oxychlorination of ethylene to 1,2-dichloroethane, comprising compounds of copper and magnesium supported on gamma alumina, wherein the copper, expressed as metal, is present in quantity from 7 to 12% by weight and the Mg/Cu ratio is from 0.05 to 1, wherein the distribution of copper in the catalyst particle is such that the ratio X/Y between the concentration of the copper atoms on the surface given by the Al/Cu ratio (X) and the concentration given by the Al/Cu ratio (Y) in the entire particle is greater than 1.3 and can reach 3, comprising the steps of drying and impregnating the alumina at least twice, wherein the first impregnation stage comprises using volumes of aqueous solution of the Cu and Mg compounds that are equal to, or smaller than, the volume of the pores of the alumina and the second impregnation stage comprises using volumes that decrease with respect to the volume used in the first impregnating.