3488.     ---------------.  [TSUTSUMI, S.]  Catalysts for the Synthesis of Liquid Hydrocarbons From Carbon Monoxide and Hydrogen.  III.  Catalysts Prepared by the Roasting Method.  (1).  Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 35, 1939, pp. 481-486; Chem. Zentralb., 1939, II, p. 3044; Chem. Abs., vol. 33, 1939, p. 6535.

        Catalysts containing 5% Co and 12% Cu or 5% Co and 4% Cu, activated with U₃O₈, are less active and have lower optimum reduction temperatures when prepared by roasting below 300° than when prepared by precipitation.  More kieselguhr must be added to the roasted catalysts to obtain the activity of the precipitated material.