Conversion of residual oil to gasoline

Claim 1

A PROCESS FOR CONVERTING HYDROCARBON FEEDS OF A HEAVY, RESIDUAL CHARACTER TO GASOLINE AND OTHER PRODUCT FRACTIONS BOILING BELOW SAID FEEDS, SAID PROCESS COMPRISING PASSING THE FEED THROUGH A COKING UNIT UNDER COKING CONDITIONS; RECOVERING FROM THE COKING UNIT A LIGHT, NITROGEN-CONTAINING OIL AND A HEAVY OIL; PASSING SAID HEAVY GAS OIL THROUGH A CRACKING UNIT UNDER CRACKING CONDITIONS; SEPARATING THE EFFLUENT FROM THE CRACKING UNIT INTO FRACTIONS INCLUDING A LIGHT, NITROGEN-CONTAINING CYCLE OIL BOILING WITHIN A RANGE OF FROM ABOUT 350 TO 650*F. AND A HEAVIER FRACTION; SUBJECTING THE LIGHT GAS OIL FROM THE COKING UNIT AND SAID LIGHT CYCLE OIL FRACTION FROM THE CRACKING UNIT TO DENITRIFICATION TREATMENT WHEREIN SAID OILS ARE PASSED, ALONG WITH ADDED HYDROGEN, OVER A HYDROGENATION CATALYST UNDER ELEVATED TEMPERATURE AND PRESSURE CONDITIONS EFFECTIVE TO CRACK NITROGEN COMPOUNDS CONTAINED THEREIN, AND RECOVERING DENITRIFIED GAS OIL AND CYCLE OIL FRACTIONS EACH CONTAINING A TOTAL OF LESS THAN 10 P.P.M. OF NITROGEN; AND CONTACTING SAID DENITRIFIED FRACTIONS IN A HYDROCRACKING ZONE, ALONG WITH AT LEAST 2000 S.C.F. H2/BBL. THEREOF, WITH AN ACIDIC CATALYST HAVING HYDROGENATING CHARACTERISTICS AND HIGH CRACKING ACTIVITY AT TEMPERATURES OF FROM ABOUT 350 TO 700*F. AND AT PRESSURES OF AT LEAST 400 P.S.I.G., WHEREBY A SUBSTANTIAL PORTION OF SAID FRACTIONS IS CONVERTED TO GASOLINE PRODUCT FRACTIONS.