Hydrotreating catalyst for hydrocarbon oil, method for producing the same, and method for hydrotreating hydrocarbon oil

A method for producing a hydrotreating catalyst for a hydrocarbon oil, comprising:

• a step (1) of providing an inorganic composite oxide carrier comprising alumina as a main component, which contains silicon and phosphorus in amounts of 0.5 to 8.0 mass % and 1.0 to 5.0 mass %, respectively, in terms of oxide, assuming that the amount of the carrier is 100 mass %;
• a step (2) of preparing an impregnating solution comprising a raw material for a first metal which is at least one of molybdenum and tungsten, a raw material for a second metal which is at least one of cobalt and nickel, a solvent, a phosphorus component, and an organic acid, and impregnating the inorganic composite oxide carrier with the impregnating solution;
• and
• a step (3) of drying and then calcining the inorganic composite oxide carrier impregnated with the impregnating solution obtained in the step (2) to give a hydrotreating catalyst.