Catalytic conversion process for the production of low luminosity fuels

Claim 1

THE PROCESS OF PRODUCING A JET FUEL OF HIGH LUMINOMETER NUMBER, WHICH COMPRISES: PASSING A MIXTURE OF A HYDROCARBON DISTILLATE FEED BOILING OVER A RANGE OF AT LEAST 50*F. IN THE RANGE OF FROM ABOUT 500*F. TO ABOUT 1050*F. AND CONTAINING LESS THAN ABOUT 100 P.P.M. OF TOTAL NITROGEN, IN THE PRESENCE OF AT LEAST 1500 S.C.F. OF COMPRESSED HYDROGEN PER BARREL OF SEED FEED AT A PRESSURE OF AT LEAST 500 P.S.I.G., A TEMPERATURE BETWEEN 400* AND 900*F., AND A LIQUID HOURLY SPACE VELOCITY OF ABOUT 0.2 TO 3.0 V./V./HR., THROUGH A HYDROCRACKING ZONE IN CONTACT WITH A HYDROCRACKING CATALYST COMPRISING A CRACKING COMPONENT SELECTED FROM THE GROUP CONSISTING OF SILICA-ALUMINA AND SILICA-MAGNESIA AND A HYDROGENATING COMPONENT SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF NICKEL, TUNGSTEN, MOLYBDENUM AND COBALT AND MIXTURES THEREOF, THE REACTION IN SAID HYDROCRACKING ZONE BEING CHARACTERIZED BY A NET CONSUMPTION OF HYDROGEN AND A SUBSTANTIALLY CONSTANT CONVERSION OF AT LEAST ABOUT 25 VOLUME PERCENT PER PASS OF SAID HYDROCARBON FEED TO PRODUCT BOILING BELOW THE INITIAL BOILING POINT OF SAID FEED; WITHDRAWING THE RESULTING HYDROCRACKED MIXTURE UNDER PRESSURE FROM HYDROCRACKING ZONE; SEPARATING SAID HYDROCRACKED MIXTURE INTO A COMPRESSED HYDROGEN STREAM, AS WELL AS AT LEAST ONE HYDROCARBON GAS FRACTION, A RELATIVELY LIGHT SYNTHETIC LIQUID FRACTION BOILING OVER THE RANGE OF FROM ABOUT 320* TO ABOUT 550*F. AND BELOW THE INITIAL BOILING POINT OF SAID HYDROCARBON FEED, AND A RELA-