Process for reforming of hydrocarbons boiling within the gasoline range utilizing a platinum-alumina-halide catalyst

Claim 1

IN THE REFORMING OF A HYDROCARBON CHARGE STOCK CONTAINING PARAFFINS AND NAPHTHENES AND BOILING WITHIN THE GASOLINE RANGE BY CONTACTNG SAID STOCK AND HYDROGEN IN A REFORMING ZONE WITH A CATALYST COMPRISING PLATINUM, ALUMINA AND COMBINED HALOGEN AT PARAFFIN HYDROCRACKING AND NAPHTHENE DEHYDROGENATING CONDITIONS INCLUDING A TEMPERATURE OF FROM ABOUT 750* TO ABOUT 1000* F. AND A PRESSURE OF FROM ABOUT 50 TO ABOUT 1200 POUNDS PER SQUARE INCH, WHEREIN THE EXTENT OF THE HYDROCRACKING REACTION TENDS TO DECREASE WITH CONTINUED USE OF THE CATALYST, THE IMPROVEMENT WHICH COMPRIESES INTRODUCING TO SAID ZONE, DURING THE REFORMING OF SAID STOCK THEREIN AND WHILE SAID CATALYST STILL RETAINS SUBSTANTIAL NAPHTHENE DEHYDROGENATING ACTIVITY, A HALOGEN COMPOUND REACTABLE WITH THE ALUMINA AT SAID CONDITIONS AND REACTING A SUFFICIENT AMOUNT OF SAID COMPOUND WITH THE ALUMINA TO MAINTAIN THE HYDROCRACKING ACTIVITY OF THE CATALYST SUBSTANTIALLY CONSTANT.