Hydrocracking process

Claim 1

A PROCESS FOR HYDROCRAKING AND DESULFURZING A MINERAL OIL FEEDSTOCK BOILING ABOVE THE GASOLINE RANGE AND CONTAINING AT LEAST ABOUT 0.1% SULFUR TO PRODUCE GASOLINE-BOILING RANGE HYDROCARBONS OF REDUCED SULFUR CONTENT, WHICH COMPRISES CONTACTING SAID FEEDSTOCK WITH A HYDROCRACKING CATALYST SUBSTANTIALLY IN STHE ABSENCE OF WATER AND OXYGEN AND IN THE PRESENCE OF BETWEEN ABOUT 1,000 AND 10,000 S.C.F. OF HYDROGEN PER BARREL OF FEED, SAID HYDROCRACKING CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF AN ADSORBENT ACIDIC OXIDE CARRIER HAVING CRACKING ACTIVITY, AND A MINOR PROPORTION OF MIXED CHROMIUM SULFIDES DERIVED BY THE REDUCTION OF CHROMIUM SULFATE AS DEFINED IN CLAIM 4, THE CONDITIONS OF HYDROCRACKING COMPRISING A TEMPERATURE BETWEEN ABOUT 750* AND 1050*F., HYDROGEN PRESSURE BETWEEN ABOUT 500 AND 5,000 P.S.I.G., AND SPACE VELOCITY BETWEEN ABOUT 0.1 AND 10 VOLUMES OF LIQUID FEED PER VOLUME OF CATALYST PER HOUR.

Claim 2

A METHOD FOR PREPARING A HYDROCRACKING CATALYST, WHEREIN THE HYDROGENATION COMPONENT CONSISTS OF A HIGHLY ACTIVE FORM OF CHROMIUM SULFIED, WHICH COMPRISES IMPREGNATING AM ADSORBENT, ACIDIC OXIDE CARRIER HAVING CRACKING ACTIVITY WITH SUFFICIENT OF AN AQUEOUS SOLUTION OF CHROMIUM SULFATE TO DEPOSIT ON SAID CARRIER A MINOR PROPORTION OF CHROMIUM SULFATE, DRAINING AN DRYING THE IMPREGNATED CATALYST AND THEN SUBJECTING THE DRIED CATALYST TO REDUCTION IN A STREAM OF HYDROGEN AT 300* TO 600* C. FOR 1 TO 5 HOURS WHILE CONTINUOUSLY REMOVING WATER, HYDROGEN SULFIDE, SULFUR DIOXIDE AND FREE SULFUR FROM THE CONTACTING ZONE.

Claim 3

A METHOD FOR PREPARING A HYDROCRACKING CATALYST, WHEREIN THE HYDROGENATION COMPONENT CONSISTS OF A HIGHLY ACTIVE FORM OF CHROMIUM SULFIED, WHICH COMPRISES IMPREGNATING AM ADSORBENT, ACIDIC OXIDE CARRIER HAVING CRACKING ACTIVITY WITH SUFFICIENT OF AN AQUEOUS SOLUTION OF CHROMIUM SULFATE TO DEPOSIT ON SAID CARRIER A MINOR PROPORTION OF CHROMIUM SULFATE, DRAINING AN DRYING THE IMPREGNATED CATALYST AND THEN SUBJECTING THE DRIED CATALYST TO REDUCTION IN A STREAM OF HYDROGEN AT 300* TO 600* C. FOR 1 TO 5 HOURS WHILE CONTINUOUSLY REMOVING WATER, HYDROGEN SULFIDE, SULFUR DIOXIDE AND FREE SULFUR FROM THE CONTACTING ZONE.