CRACKING CATALYST, PROCESS FOR PREPARATION THEREOF, AND PROCESS FOR CATALYTIC CRACKING OF HYDROCAR

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A cracking catalyst which has high cracking activity and makes it possible to produce high-octane FCC gasoline through efficient progress without lowering the yield of gasoline; a process for the preparation of the catalyst; and a process for catalytic cracking of hydrocarbon oil with the same. A catalyst for catalytic cracking of hydrocarbon oil comprising a crystalline aluminosilicate having a predetermined composition, a binder, and clay mineral, which has contents of sodium and potassium in terms of oxides (Na2O and K2O) of 0.5% by mass or below, contents of rare earth metals in terms of oxides (RE2O3 wherein RE is a rare earth element) of 3.0% by mass or below, a mass ratio of [RE2O3 + Na2O + K2O]/[crystalline aluminosilicate] of 0.1 or below, and a xenon adsorption of at least 2.20Œ1020 molecules per g of the catalyst as determined at 25°C and a xenon partial pressure of 650torr; a process for the preparation of the catalyst; and a process for catalytic cracking of hydrocarbon oil with the same.