Platinum-containing reforming catalysts

Claim 1

A PROCESS FOR PREPARING A CATALYST FOR REFORMING A HYDROCARBON FRACTION BOILING WITHIN THE GASOLINE-KEROSINE RANGE WHICH COMPRISES CONTACTING A CRACKING COMPONENT CONSISTING ESSENTIALLY OF SILICA AND AT LEAST ONE METAL OXIDE FROM THE GROUP CONSISTING OF ALUMINA, ZICONIA, MAGNESIA, AND THORIA, WITH AN AQUEOUS SOLUTION OF A COMPOUND OF A METAL FROM THE GROUP CONSISTING OF PLATINUM AND PALLADIUM, THE CRACKING COMPONENT BEING CHARACTERIZED BY HAVING A CATALYTIC ACTIVITY WITHIN THE RANGE BETWEEN 10 AND 50 AS COMPARED WITH A THEORETICAL MAXIMUM CATALYTIC ACTIVITY OF 100 AND A PRACTICABLE MAXIMUM CATALYTIC ACTIVITY OF BETWEEN 90 AND 95 ON A DISTILLATE-PLUS-LOSS SCALE FOR THE MEASUREMENT OF THE CATALYTIC ACTIVITY OF A CRACKING CATALYST, THE COMPOUND OF THE METAL IN THE AQUEOUS SOLUTION BEING IN AN AMOUNT SUCH THAT UPON CONTACT OF THE CRACKING COMPONENT WITH THE AQUEOUS SOLUTION BETWEEN 0.1 PER CENT AND 2.5 PER CENT OF THE METAL BY WEIGHT OF THE CRACKING COMPONENT WILL BE DEPOSITED ON THE CRACKING COMPONENT, SUBJECTING THE CRACKING COMPONENT AND AQUEOUS SOLUTION WHILE MAINTAINING SUBSTANTIALLY CONSTANT MOISTURE CONTENT TO A TEMPERATURE FOR A TIME SUFFICIENT TO EFFECT FIXATION ON THE CRACKING COMPONENT OF AT LEAST 50 PER CENT OF THE METAL DEPOSITED ON THE CRACKING COMPONENT, DRYING THE CRACKING COMPONENT WITH THE COMPOUND OF THE METAL DEPOSITED THEREON, AND REDUCING THE METAL COMPOUND TO THE METAL.