“…Different support for hydrotreating catalysts has been studied. The most widely used alumina support for its mechanical properties and excellent inspection, as a general rule, active components are loaded on support using cobalt (nickel) nitrates and ammonium heptamolybdate solutions [5]. Alumina, zeolite, carbon, silicon, zirconia or clay materials are used as support and a catalytic metals used are nickel, platinum, palladium, molybdenum, cobalt, copper, iron.…”