Two-stage hydrogenation process for the production of gasoline from hydrocarbon oils

Claim 1

A PROCESS FOR THE PRODUCTION OF GASOLINE FROM OILS BY CATALYST PRESSURE HYDROGENATION WHICH COMPRISES: LEADING THE INITIAL OIL TOGETHER WITH HYDROGEN THROUGH A FIRST STAGE UNDER A PRESSURE OF 50 TO 600 ATMOSPHERES AT A TEMPERATURE OF 250*C. TO 450*C. OVER A SYNTHETIC SILICATE CATALYST UNDER SUCH CONDITIONS OF PRESSURE, TEMPERATURE AND THROUGHOUT THAT AT MOST AN IMMATERIAL CRACKING OF ABOUT 1 TO 5% OCCURS, SAID CATALYST PREPARED BY PRECIPITATING A SILICATE OF AT LEAST ONE METAL SELECTED FROM THE CLASS CONSISTING OF NICKEL AND COBALT FROM AN AQUEOUS SOLUTION THEREOF, WASHING THE RESUTLING METAL SILICATE PRECIPITATE AND DRYING IT AT 30*C. TO 150* C. FOR A PERIOD OF 3 3 TO 15 HOURS, SLOWLY HEATING THE DRIED METAL SOLICATE TO TEMPERATURES OF 150*C. TO 400*C. TO 150 CALCINING THE CATALYST AT A TEMPERATURE ABOVE 400*C.; AND THEN LEADING THE REACTION PRODUCT OF SAID FIRST STAGE TOGETHER WITH HYDROGEN THROUGH A SECOND STAGE UNDER A PRESSURE OF MORE THAN 50 ATMOSPHERES AT A TEMPERATURE OF 360*C. TO 550*C. OVER A CRACKING CATALYST COMPOSED OF A CARRIER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM SILICATE AND MAGNESIUM SILICATE. SAID CARRIER BEING COMBINED WITH AT LEAST ONE NUMBER OF THE GROUP CONSISTING OF OXIDES AND SULFIDES OF A METAL OF THE 6TH TO 8TH GROUPS OF THE PERIODIC SYSTEM. FOR THE PURPOSE OF CRACKING SAID REACTION PRODUCT OF SAID FIRST STAGE TO A HIGH OCTANE GASOLINE.