Patent ID: 6428685
Filing Date: 2002-08-06
Classification: B01J,C10G

Abstract:
A process for the removal of sulfur from a stream of a cracked-gasoline or a diesel fuel which comprises:(a) contacting said stream with a sorbent composition which is comprised of zinc oxide, silica, a promotor metal, alumina and a calcium compound selected from the group consisting of calcium sulfate, calcium aluminate, calcium phosphate and calcium silicate wherein said promotor metal is present in a substantially reduced valence state and in amount which effects the removal of sulfur from said stream of cracked-gasoline or diesel fuel under conditions in a desulfurization zone such that there is formed a desulfurized fluid stream of cracked-gasoline or diesel fuel and a sulfurized sorbent; (b) separating the resulting desulfurized fluid stream from said sulfurized sorbent; (c) regenerating at least a portion of the separated sulfurized sorbent in a regeneration zone so as to remove at least a portion of the sulfur absorbed thereon; (d) reducing the resulting desulfurized sorbent in an activation zone so as to provide a reduced valence promotor metal content therein which will affect the removal of sulfur from a stream of a cracked-gasoline or diesel fuel when contacted with same; and thereafter (e) returning at least a portion of the resulting desulfurized, reduced sorbent to said desulfurization zone wherein said promotor metal is selected from the group consisting of cobalt, nickel, iron, manganese, copper, molybdenum, tungsten, silver, tin and vanadium or mixtures thereof.