A PROCESS FOR HYDROGENATION-HYDROTREATING OF HYDROCARBON MATERIALS, COMPRISING; CONTACTING A HYDROCARBON MATERIAL, SUCH AS NAPHTHAS, KEROSENE, CYCLE OILS, GAS OILS, COAL LIQUIDS, AND PARTICULARLY A HYDROCARBON MATERIAL CONTAINING NAPHTHALENE, ALKYLBENZENES, AND ALKYLNAPHTHALENES, WITH A CATALYST CONTAINING AN ACTIVE HYDROGENATIONDEHYDROGENATION METAL, SUCH AS A METAL SELECTED FROM THE GROUP CONSISTING OF IB, IIB,VIB AND VIII OF THE PPERIODIC SYSTEM AND A BASIC METAL OXIDE PROMOTER SELECTED FROM THE GROUP CONSISTING OF GROUPS IA, IIA, IV, AND RARE EARTH METALS OF THE PERIODIC SYSTEM,BOTH DEPOSITED ON AN INERT OXIDE SUPPORT, SUCH AS GAMMA ALUMINAS, SILICA-ALUMINA, SILICA-ZIRCONIA, SILICA-MAGNESIA, ETC., AT A TEMPERATURE OF ABOUT 500 TO 900 F., A PRESSURE OF ABOUT 100 TO 300 P.S.I.G., A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 0.1 AND 10, AND A HYDROGEN-TO-HYDROCARBON MOLE RATIO OF ABOUT 3 TO 15 TO 1.