The book presents the production of oil hydrotreating catalyst, the method of synthesis of wide-porous carrier, physicochemical and other properties of oil hydrotreating catalyst, production and innovative technological processes developed on the basis of physicochemical research. Regularities and theoretical dependencies of interaction of cobalt, nickel and molybdenum salts, methods of their application on the carrier, methods of heat treatment are considered, the technology of obtaining trimetallic cobalt-nickel-molybdenum catalyst for hydrotreating of oils is proposed.The book is intended for scientific and engineering technicians of scientific and design centers, as well as for masters of universities, doctoral students in the direction of catalysis and oil refining.