FLUID CATALYTIC CRACKING CATALYST HAVING DESULFURIZING FUNCTIONS, PROCESS FOR PRODUCTION OF THE SAME, AND PROCESS FOR PRODUCTION OF LOW-SULFUR CATALYTICALLY CRACKED GASOLINE WITH THE CATALYST

摘要

The present invention 1, 2 or 3 provides a desulfurization function-added FCC catalyst which can efficiently reduce the sulfur content of FCC gasoline while maintaining the yield of FCC gasoline in a process of producing FCC gasoline by cracking of heavy oil. The catalyst has vanadium supported on a carrier comprising (a) an alumina-coated zeolite and (b) a porous inorganic oxide except zeolite and/or a clay mineral, wherein the supported vanadium amount is from 500 to 20000 ppm by mass in terms of vanadium metal and the acid amount is from 20 to 450 mumol/g and the macropore surface area is from 30 to 150 m2/g; or the catalyst has vanadium supported on a carrier containing from 5 to 40% by mass of (a) an alumina-coated zeolite and from 30 to 70% by mass of (b) an alumina, wherein the vanadium concentration ratio before and after grinding the catalyst is at least 2; or the catalyst has at least vanadium and manganese and/or phosphorus supported on a porous inorganic oxide-containing carrier, wherein the supported vanadium amount is from 500 to 20000 ppm by mass in terms of vanadium metal, vanadium and manganese and/or phosphorus form a complex ion in the supporting solution for use in supporting vanadium and manganese and/or phosphorus, and the permeability of the complex ion through a reverse osmosis membrane is at most 25% relative to the permeability of vanadium through the reverse osmosis membrane.