Hydrocracking process

Claim 1

A PROCESS FOR CONVERSION OF HYDROCARBONS WHICH COMPRISIES THE STEPS OF HYDROCRACKING A HYDROCARBON FEED HAVING A BOILING RANGE IN THE RANGE FROM 400 TO 1000*F., TOGETHER WITH A HEAVY GASOLINE RECYCLE FEED DESCRIBED HEREAFTER, IN THE PRESENCE OF A HYDRROCRACKING CATALYST CONTANINING 1-10 WEIGHT PERCENT OF A GROUP V111 METAL SELECTED FROM THE GROUP CONSISTING OF PLATINUM, PALLADIUM RHODIUM, IRIDIUM NICKEL AND COBALT DEPOSITED ON A SOLID INORGANIC METAL OXIDE CRACKING COMPONENT, UNDER CONDITIONS FAVORING DEHYDROGENATION OF NAPHTHENES TO AROMATICS, EMPLOYING A TEMPERATURE FROM 800TO 950*F., A PRESSURE FROM 300 T 1000 P.S.I.A., A LIQUID HOURLY SPACE VELOCITY OF TOTAL HYDROCARBON FEED FROM 0.2 TO 10, AND A RATIO OF HYDROGEN TO TOTAL HYDROCARBONS FEED OF AT LEAST 1000 S.C.F. PER BARREL; SEPARATING THE RESIDUE FRACTION OF GTHE EFFLUENT BOILING ABOVE 400*F. FROM THE PRODUCT GASOLINE FRACTION, HYDROCRACKING SAID RESICUE IN ANOTHER HYDROCRACKING STEP IN THE PRESENCE OF A CATALYST OF THE FOREGOUNG DESCRIPTION UNDNER CONDICTIONS FAVORING HYDROGENATION OF AROMATICS TO NAPHTHEHES, EMPLOYING A TEMPERATURE FROM 600 TO 780*F., A PRESSURE FROM 500 TO 2000 P.S.I.A., A LIQUID HOURLY SPACE VEOLCITY OF TOTAL HYDROCARBON FEED FROM 0.2 TO 10, AND A RATIO OF HYDROGEN TO TOTAL HYDROCARBON FEED OF AT LEAST 1000 S.C.F. PER BARREL; SEPARATING A HEAVY GASOLINE FRACTION FROM THE EFFLUENT FROM SAID ANOTHER HYDROCRACKING STEP AND RECYCLING SAME AS PART OF THE SAID TOTAL FEED TO THE FIRST-MENTIONED HYDROCRACKING STEPS.