Catalytic conversion of heavy naphtha fractions

Claim 1

A METHOD FOR TREATING THE PRODUCTS OBTAINED FROM THE CATALYTIC CRACKING OF A HYDROCARBON GAS OIL FRACTION WHICH COMPRISES THE STEPS OF RECOVERING FROM THE PRODUCTS OF CATALYTIC CRACKING A HEAVY NAPHTHA FRACTION BOILING WITHIN THE RANGE OF ABOUT 350* TO 430*F. AND A HEAVIER FRACTION BOILING WITHIN THE RANGE OF ABOUT 450* TO 900*F., SUBJECTING SAID HEAVIER PRODUCT FRACTION TO SOLVENT EXTRACTION IN THE PRESENCE OF A SOLVENT FOR THE SELECTIVE REMOVAL OF AROMATICS TO THEREBY PROVIDE AN AROMATICS EXTRACT FRACTION BOILING WITHIN THE RANGE OF ABOUT 450* TO 900* F., ADMIXING FROM ABOUT 50 TO 80 VOLUME PERCENT OF SAID AROMATIC EXTRACT FRACTION WITH SAID HEAVY NAPHTHA FRACTION AND CHARGING THE RESULTANT MIXTURE TO A CATALYTIC HUDROCRACKING ZONE CONTAINING A BED OF A SUPPORTED COBALT MOLYBDATE CATALYST IN THE PRESENCE OF ABOUT 500 TO 2000 CUBIC FEET OF HYDROGEN PER BARREL OF MIXTURE UNDER HYDROCRACKIG CONDITIONS INCLUDING A TEMPERATURE WITHIN THE RANGE OF ABOUT 900* TO 950*F. AND A PRESSURE WITHIN THE RANGE OF ABOUT 700 TO ABOUT 950 P.S.I.G. AT A NAPHTHA FEED STOCK CHARGE RATE WITHIN THE RANGE OF ABOUT 0.7 TO 1 V../V./HR., AND RECOVERING FROM THE PRODUCTS OF SAID CATALYTIC HYDROCACKING STEP A NAPHTHA FRACTIOIN BOILING WITHIN THE RANGE OF ABOUT 120* TO ABOUT 350*F.