A catalyst useful in cracking of hydrocarbon feedstock comprising particulate
material
composed of at least 70 weight percent zeolite and the remainder substantially
composed of silica sol, alumina sol or mixtures thereof; wherein the particulate
material has a kinetic conversion activity of at least about 3; and compositions
for fluid catalytic cracking of petroleum feedstock comprising said catalyst and
a second particulate material having a kinetic conversion activity of less than
3 wherein said catalyst composition having a kinetic conversion activity of at
least about 2.
