Abstract: A catalyst used for liquefaction of coal and hydrogenolysis or hydrodesulfurization of heavy oils. The catalyst is prepared by reacting one or more compounds selected from the group consisting of carbonyl compounds of molybdenum, salts of molybdenum, oxides of molybdenum, metallic molybdenum, and alloys containing molybdenum, with alkali and water at a temperature ranging from 220.degree. to 450.degree. C. under a carbon monoxide atmosphere; and reducing the product obtained at temperature ranging from 400.degree. to 450.degree. C. under a hydrogen atmosphere.

Abstract: A catalyst used for liquefaction of coal and hydrogenolysis or hydrodesulfurization of heavy oils. The catalyst is prepared by reacting one or more compounds selected from the group consisting of carbonyl compounds of molybdenum, salts of molybdenum, oxides of molybdenum, metallic molybdenum, and alloys containing molybdenums, with alkali and water, at a temperature ranging from 220.degree. to 450.degree. C. under a carbon monoxide atmosphere; and reducing the product obtained at a temperature ranging from 400.degree. to 450.degree. C. under a hydrogen atmosphere.