Process for preparing catalysts for the hydrotreatment of petroleum fractions and said catalysts

Abstract From the Canadian patent

A process for producing catalysts for hydrotreating petroleum fractions, said catalysts containing after thermal treatment, at least an oxide or a sulphide of a group VIII metal and at least an oxide or a sulphide of a Group VI B metal and an alumina support said process comprising preparing said catalyst in the form of beads by agglomeration of alumina by polymerizing in a hot substantially, water-immiscible fluid medium an aqueous mixture consisting, essentially of alumina hydrogel and a water-soluble monomer whose uncrossed-linked polymer is water-soluble or forms a gel and, thereafter dispersing said aqueous mixture in the form of droplets into said fluid medium in which substantial …