Hydrocracking of a hydrocarbon distillate employing a sulfide of nickel or cobalt, disposed on an active siliceous cracking catalyst support

Claim 1

A PROCESS FOR CONVERTING A HYDROCARBON DISTILLATE FEED HAVING A TOTAL NITROGEN CONTENT OF LESS THAN 10 P.P.M. AND BOILING WITHIN A RANGE OF FROM ABOUT 320* TO 850* F. TO PRODUCT FRACTIO BOILING BELOW THE INITIAL BOILING POINT OF SAID FEED IN A YIELD OF AT LEAST 20% PER PASS, WHICH COMPRISES PASSING SAID FEED, ALONG WITH AT LEAST 1500 S.C.F. H2 PER BARREL THEREOF, THROUGH AN ISOCRACKING ZONE FOR CONTACT THEREN, AT HYDROGEN PARTIAL PRESSURES OF AT LEAST 350 P.S.I.G., AT TEMPERATURES BETWEEN 350* AND ABOUT 400*F., AND AT LIQUID HOURLY SPACE VELOCITIES ABOVE 0.2 V./V./HR., WITH A CATALYST COMPRISING A HYDROGENATING COMPONENT SELECTED FROM THE GROUP CONSISTING OF NICKEL SULFIDE AND COBALT SULFIDE AS DISPOSED ON AN ACTIVE SILICEOUS CRACKING CATALYST SUPPORT, THE PROCESS BEING CHARACTERIZED BY OPERATION DURING A SUBSTANTIAL PORTION OF THE ONSTREAM PERIOD NOT LESS THAN 10 HOURS AT TEMPERATURES BELOW 650*F., AND BY A HYDROGEN CONSUMPTION OF AT LEAST 500 S.C.F. PER BARRL OF FEED SO CONVERTED.