Hydrogenation of mineral oils in the presence of a minor amount of a hydrogenating catalyst and a major amount of a specific type of activated alumina

Claim 1

THE PROCESS FOR DESTRUCTIVE HYDROGENATION WITH AN OVER-ALL CONSUMPTION OF HYDROGEN OF A RESIDUAL FRACTION OF PETROLEUM, WHICH COMPRISES CONTACTING SAID FRACTION WITH HYDROGEN UNDER DESTRUCTIVE HYDROGENATION CONDITIONS OF TEMPERATURE AND PRESSURE IN THE PRESENCE OF A CATALYST COMPRISING ESSENTIALLY A MINOR AMOUNT OF A HYDROGENATING CATALYST COMPOSITED WITH A MAJOR AMOUNT OF AN ACTIVATED ALUMINA PREPARED BY DRYING AND CALCINING A SUBSTANCE WHICH IS PREDOMINANTLY COMPOSED OF AN ALUMINUM HYDROXIDE CONTAINING FROM 1.2 TO 2.6 MOLS OF WATER OF HYDRATION, SAID ALUMINUM HYDROXIDE BING PREPARED BY PRECIPITATION FROM A SOLUTION OF AN ALUMINUM SALT AT A PH BETWEEN 7 TO 12 AND DRYING TO THE ABOVE SPECIFIED WATER OF HYDRATION CONTENT PRIOR TO SUBSTANTIAL TRANSFORMATION TO AN ALUMINUM HYDROXIDE HAVING A HIGHER OR LOWER WATER OF HYDRATION CONTENT.