Hydrocatalytic refining of lubricating oils and catalyst therefor

Claim 1

THE PROCESS OF REFINING MINERAL LUBRICATING OILS, HAVING NATURAL RESISTANCE TO OXIDATION AND DETERIORATION DUE TO THE CONTENT OF NATURALLY-OCCURRING SULFUR COMPOUNDS THEREIN AND CONTAINING ACIDIC COMPOUNDS WHEREBY SAID CONTENT OF ACIDIC COMPOUNDS IS REDUCED WITHOUT AFFECTING THE CONTENT OF NATURALLY-OCCURRING SULFUR COMPOUNDS AND WITHOUT DELETERIOUSLY AFFECTING THE VISCOSITY, VISCOSITY INDEX AND STEAM EMULSION NUMBER OF SAID MINERAL LUBRICATING OILS WHICH CONSISTS IN SUBJECTING SAID MINERAL LUBRICATING OILS TO CONTACT WITH HYDROGEN AT A TEMPERATURE OF BETWEEN ABOUT 550* AND 600*F. IN PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AN ALUMINA BASE CONTAINING ABOUT 94.2 WT. PERCENT ALUMINA AND ABOUT 5.8 WT. PERCENT SILICA WITH ABOUT 3.0 WT. PERCENT MOLYBDENUM OXIDE, AN ALUMINA BASE CONTAINING ABOUT 99.0 WT. PERCENT ALUMINA AND ABOUT 1.0 WT. PERCENT SILICA WITH ABOUT 9.0 WT. PERCENT MOLYBDENUM OXIDE AND AN ALUMINA BASE CONTAINING ABOUT 95.0 WST. PERCENT ALUMINA AND ABOUT 5.0 WT. PERCENT SILICA WITH ABOUT 3.0 WT. PERCENT MOLYBDENUM OXIDE, AND RECOVERING A HYDROGENATED LUBRICATING OIL CHARACTERIZED BY HAVING A NEUTRALIZATION NUMBER OIL CHARACTERIZED BY HAVING A NEUTRALIZATION NUMBER (1948 METHOD) OF BELOW ABOUT 0.03, THE ORIGINAL CONTENT OF NATURALLY-OCCURRING SULFUR COMPOUNDS, WITHOUT IMPAIRMENT OF THE PHYSICAL PROPERTIES THEREOF.