Process and composition for the hydrocracking of hydrocarbon oils

Claim 1

A PROCESS FOR HYDROCRACKING A PETROLEUM DISTILLATE AT LEAST 90 PERCENT OF WHICH BOILS ABOVE 400* F., SAID PROCESS COMPRISIN CONTCTING THE SAID DISTILLATE WITH HYDROGEN AT A PARTIAL PRESSURE BETWEEN 750 AND 2000 P.S.I. AT A TEMPERATURE BETWEEN 625* AND 850* F., THE HYDROGEN BEING FED AT A RATE BETWEEN 4000 AND 10,000 S.C.F./BBL. OF SAID DISTILLATE IN THE PRESENCE OF A CATALYTIC COMPOSITION COMPRISING A HYDROGENATING COMPONENT COMPOSITED WITH A DRIED AND CALCINED REFRACTORY CARRIER HAVING CRACKING ACTIVITY AND HAVING BEN PREPARED FROM A GELLED MICTURE OF A FRESHLY PREPARED, CATION-FREE SILICA SOL OBTAINED BY ION EXCHANGE OF WATER GLASS SOLUTION WITH A SOLID, WAER INSOLUBLE, CATION EXCHANGE MATERIAL IN ACID FORM, AND AN AQUEOUS SOLUTION OF A COMPOUND YIELDING ALMINUM CAIONS IN AQUEOUS SOLUTION, SAID REFRACTORY CARRIER CONTAINING THE EQUIVALENT OF BETWEEN 25 AND 55 PERCEN AL2O3 AND BETWEEN 75 AND 45 PERCENT SIO2, AT A LIQUID HOURLY SPACE VELOCITY LYING BETWEEN 0.5 AND 10.0 VOLUMES, AS LIQUID, OF SAID PETROLEUM DISTILLATE PER VOLUME OF SAID CATALYTIC OMPOISITION PER HOUR TO FORM A LIQUID PRODUCT COMPOSED CHIEFLY OF HYDROCARBONS BOILING IN THE GASOLINE RANGE.