Process for manufacturing a catalyst on an alumina support and the catalyst produced by the process

Claim 1

In a process for the production of a catalyst consisting essentially of (a) a carrier consisting essentially of a major part of alumina and, (b) an active phase consisting essentially of at least one metal from group VIII and at least one additional metal or promoter, wherein the carrier is obtained by admixing a binding agent consisting essentially of a major part of alumina base, with a charge, consisting essentially of a major part of alumina base, shaping and drying the resultant mixture, the proportion by weight of the binding agent amounting to 15-40% of the total carrier, the proportion by weight of the charge amounting to 60-85% of the total carrier, the alumina binding agent consisting essentially of dispersed alumina and 0-30% of non-dispersed alumina, the alumina charge consisting essentially of non-dispersed alumina and less than 10% of dispersed alumina, the dispersion rate of the composition resulting from the mixture of the binding agent with the charge being from 10 to 60%, the improvement wherein in said process at least a portion of a source of said additional metal is introduced into the binding agent or into the charge prior to completion of the formation of said carrier, and wherein said group VIII metal is incorporated subsequent to inclusion of the additional metal in the carrier, said improvement further comprising simultaneously mixing (a) the said source of the additional metal (b) the binding agent and (c) the charge, the said source of the additional metal penetrating into either the charge or the binding agent, either the charge or the binding agent having previously been saturated with a salt such that the source does not penetrate into the portion of the carrier that has been so saturated.