Hydrofining-hydroforming system

Claim 1

A HYDROCARBON CONVERSION PROCESS WHICH COMPRISES HYDROFINING A SULFUR-CONTAINING NAPHTHA AT A PRESSURE IN THE RANGE OF ABOUT 200 TO 1500 P.S.I.G. AND A TEMPERATURE IN THE RANGE OF 600-800* F. IN A FIRST HYDROFINING ZONE, COOLING THE EFFLUENT FROM THE FIRST HYDROFINING ZONE AT SUBSTANTIALLY HYDROFINING PRESSURE TO CONDENSE HYDROCARBONS HIGHER BOILING THAN HEXANE WITHOUT CONDENSING APPRECIABLE AMOUNTS OF PENTANES AND LOWER BOILING HYDROCARBONS, SEPARATING IN A FIRST SEPARATION ZONE AT A TEMPERATURE ABOVE 200* F. CONDENSED HYDROCARBONS FROM A HYDROGEN STREAM CONTAINING H2S AND UNCONDENSED HYDROCARBONS, CONTACTING SAID HYDROGEN STREAM AND A DISTILLATE HYDROCARBON FUEL WHICH IS HIGHER BOILING THAN GASOLINE WITH A HYDROFINING CATALYST IN A SECOND HYDROFINING ZONE AT A TEMPERATURE IN THE RANGE OF ABOUT 600 TO 800* F. AND AT A SLIGHTLY LOWER PRESSURE THAN THAT MAINTAINED IN THE FIRST NAMED HYDROFINING STEP SO THAT THE HYDROGEN STREAM REQUIRES NO FURTHER COMPRESSION BETWEEN SAID FIRST AND SECOND HYDROFINING ZONES, COOLING THE SECOND HYDROFINING REACTION ZONE EFFLUENT, SEPARATING CONDENSED HYDROCARBONS THEREFROM AT SUBSTANTIALLY HYROFINING PRESSURE IN A SECOND SEPARATION ZONE AND DISTILLING SAID SEPARATED HYDROCARBONS TO OBTAIN A DISTILLATE FUEL OIL AND A NAPHTHA FRACTION, CONTACTING SAID FIRST NAMED CONDENSED HDYROCARBONS WITH A PLATINUM-ONALUMINA CATALYST AT A TEMPERATURE IN THE RANGE OF ABOUT 850 TO 950* F. UNDER A PRESSURE IN THE RANGE OF ABOUT 200 TO 750 P.S.I. TO EFFECT HYDROFORMING, SEPARATING A HYDROGEN STREAM CONTAINING LOW BOILING HYDROCARBONS FROM HYDROCARBONS PRODUCED IN THE HYDROFORMING STEP, RECYCLING MOST OF THE LAST NAMED SEPARATED HYDROGEN STREAM TO THE HYDROFORMING STEP AND INTRODUCING THE REMAINDER TO THE FIRST NAMED HYDROFINING STEP.