Fluid cracking catalyst process using a zeolite dispersed in a magnesia-alumina-aluminum phosphate matrix

Claim 1

A process for increasing the gasoline yield and quality in a petroleum cracking reaction by contacting a hydrocarbon feedstock under catalytic cracking conditions with a catalyst comprising a magnesia-alumina-aluminum phosphate matrix characterized after calcination at 500° C. for 10 hours as amorphous, and having an average pore radius of from about 10° A to about 200° A; a surface area ranging from about 100 M 2 /g to about 350 M 2 /g; a pore volume of from about 0.3 cc/g to about 1.5 cc/g; and wherein the magnesia-alumina-aluminum phosphate matrix has a mole percent ratio of from about 10:80:10 to about 25:10:65, and wherein said matrix retains at least 90% of its surface area when the matrix is additionally calcined at a temperature up to about 750° C. for about 10 hours; said matrix being composited with from about 5 to about 50 weight percent of a REY-zeolite.