Combined thermal reforming, catalytic cracking and hydrofining process to improve engine cleanliness

Claim 1

PROCESS FOR THE PRODUCTION OF A HIGH QUALITY MOTOR FUEL WHICH COMPRISES DISTILLING A CRUDE OIL TO SEGREGATE A HYDROCARBON FRACTION BOILING IN THE RANGE FROM ABOUT 100*F. TO 330*F., A HYDROCARBON FARACTION BOILING IN THE RANGE OF ABOUT 250*F. TO 430*F., AND A HYDROCARBON FRACTION BOILING IN THE GAS OIL BOILING RANGE, THERMALLY REFORMING SAID HYDROCARBON FRACTION BOILING IN THE RANGE FROM ABOUT 250*F. TO 430*F., DISTILLING THE PRODUCT FROM SAID THERMAL REFORMING OPERATION TO SEGREGATE A LIGHT THERMAL NAPHTA FRACTION AND A HEAVY THERMAL NAPHTHA FRACTION, HYDROFINING SAID HEAVY THERMAL NAPHTHA FRACTION UNDER CONDITIONS TO SECURE A BROMINE NUMBER REDUCTION OF LESS THAN 20%, CATALYTICALLY CRACKING SAID GAS OIL FRACTION TO PRODUCE A CATALYTICALLY CRACKED NAPHTHA, THEREAFTER BLENDING SAID NAPHTHA FRACTION BOILING IN THE RANGE FROM 100*F. TO 330*F., SAID LIGHT THERMAL NAPHTHA, SAID HYDROFINED HEAVY THERMAL NAPHTHA, AND SAID CATALYTIC NAPHTHA, WHEREBY A HIGH QUALITY GASOLINE BLEND HAVING IMPROVED ENGINE CLEANLINESS CHARACTERISTICS IS SECURED.