Hydrocarbon conversion process

Claim 1

A PROCESS FOR UPGRADING CRACKED NAPHTHA WHICH COMPRISES FRACTIONALLY DISTILLING THE NAPHTHA TO SEPARATE AN OVERHEAD FRACTION HAVING AN ASTM-D-86 90% POINT IN THE RANGE FROM 275 TO 350*F. AND A BOTTOMS FRACTION, SEPARATELY CONTACTING THE OVERHEAD FRACTION AND HYDROGEN AND THE BOTTOMS FRACTION AND HYDROGEN WITH A COBALTMOLYBDENUM CATALYST IN A HYDROGENATION ZONE UNDER CONDITIONS OF TEMPERATURE AND SPACE VELOCITY SUFFICIENTLY SEVERE IN EACH CASE TO REDUCE THE SULFUR CONTENT AND THE NITROGEN CONTENT OF THE LIQUID PRODUCT BELOW ABOUT 0.2% BY WEIGHT AND 5 PARTS PER MILLION, RESPECTIVELY, SAID CONDITIONS BEING SUBSTANTIALLY LESS SEVERE IN THE CASE OF THE OVERHEAD FRACTION, SEPARATELY CONTACTING THE HYDROGENATED OVERHEAD FRACTION AND HYDROGEN AND THE HYDROGENATED BOTTOMS FRACTION AND HYDROGEN WITH A PLATINUM CATALYST UNDER DEHYDROGENATING CONDITIONS SUFFICIENTLY SEVERE IN EACH CASE TO PRODUCE A LIQUID PRODUCT HAVING AN F-1 CLEAR OCTANE RATING ABOVE 80, SAID CONDITIONS BEING SUBSTANTIALLY LESS SEVERE IN THE CASE OF THE HYDROGENATED BOTTOMS FRACTION.