Cracking catalyst
AssigneePhillips Petroleum Company
InventorsBrent J. Bertus, Dwight L. McKay
Life of this patent
Estimating the term…
Abstract
A novel cracking catalyst, a method of preparing same and an improved hydrocarbon cracking process are provided wherein adverse effects of metals such as nickel, vanadium, iron, copper and cobalt in the cracking catalyst are precluded or mitigated by contacting the cracking catalyst with (A) at least one of elemental antimony and compounds thereof and (B) at least one of elemental tin and compounds thereof whereby there is added to said catalyst a modifying amount of each of (A) and (B) with the weight ratio of antimony to tin being such as to provide passivation of the contaminating metals greater than the sum of the passivation effects of each of (A) and (B) individually. In general the ratio will be in the range of from 0.001:1 to 1000:1, and preferably will be in the range of 0.05:1 to 50:1.
Claims59
A modified cracking catalyst composition which comprises zeolite cracking catalyst having in combination therewith a containing silica-alumina amount of a treating agent which comprises (A) at least one of elemental antimony and compounds of antimony and (B) at least one of elemental tin and compounds of tin.
A composition in accordance with claim 33 wherein (A) is derived from an antimony thiophosphate and (B) is derived from a dihydrocarbyltin oxide.
A modified cracking catalyst composition which comprises zeolite cracking catalyst having deposited thereon a detrimental amount of at least one contaminating metal selected from the group consisting of nickel, iron, copper, cobalt and vanadium;
- and a treating agent comprising (A) at least one of elemental antimony and compounds of antimony and (B) at least one of elemental tin and compounds of tin, with the weight ratio of antimony in (A) to tin in (B) being such as to provide a passivation of said at least one contaminating metal on said cracking catalyst greater than the sum of the passivating effects of (A) and (B) individually.
A composition in accordance with claims 53, 54 or 55 wherein the weight ratio of antimony in (A) to tin in (B) is in the range of 2:1 to 20:1.
A cracking catalyst composition which comprises a zeolite-containing silica-alumina cracking catalyst having in combination therewith (A) antimony, and (B) tin, wherein the amounts of antimony and tin are such as to have a passivating effect upon contaminating metals selected from the group consisting of nickel, iron, copper, cobalt and vanadium, and wherein the antimony has been added to said cracking catalyst in the form of at least one organic antimony compound, and wherein the tin has been added to said cracking catalyst in the form of at least one organic tin compound.
Dependencies are inferred from the claim text.