Manufacture of platinum-alumina reforming catalyst

Claim 1

A PROCESS FOR REFORMING A HYDROCARBON MIXTURE WHICH COMPRISES CONTACTING THE SAME UNDER REFORMING CONDITIONS WHICH A CATALYST CONSISTING ESSENTIALLY OF ALUMINA IMPREGNATED WITH A MINOR PROPORTION OF A PLATINUM METAL PREPARED BY REACTING SUBSTANTIALLY PURE ALUMINUM WITH EXCESS WATER, IN THE ABSENCE OF ACID, AND IN THE PRESENCE OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF MERCURY AND A MERCURY COMPOUND IN A CATALYTIC AMOUNT CORRESPONDING TO BETWEEN ABOUT 0.1% AND ABOUT 10% BY WEIGHT OF MERCURY RELATIVE TO THE AMOUNT OF ALUMINUM, CONTROLLING THE TEMPERATURE OF THE REACTION MIXTURE TO WITHIN THE RANGE OF 60*F. TO 140*F. AND MAINTAINING THE PH THEREOF WITHIN THE RANGE OF 7 TO 10 UNTIL AT LEAST A MAJOR PORPORTION OF THE ALUMINUM IS COVERED INTO ALUMINA IN THE FORM OF AN AQUEOUS SLURRY, CONTACTING THE ALUMINA SLURRY SO OBTAINED WITH A SOLUTION OF A PLATINUM METAL COMPOUND WHICH COMPOSITES WITH THE ALUMINA AN AMOUNT OF BETWEEN ABOUT 0.01 AND ABOUT 5% BY WEIGHT OF PLATINUM METAL AND THEREAFTER DRYING AND CALCINING THE RESULTING PRODUCT.