385.     BRÜCKNER, H., AND JACOBUS, G.  [Activity of Nickel Catalysts for the Synthesis of Methane.]  Brennstoff-Chem ., vol. 14, 1933, pp. 265-268; British Chem. Abs., B, 1933, p. 772; Chem. Abs., vol. 27, 1933, p. 5154.

      Addition of SiO₂ gel, Al₂O₃, ThO₂, or the oxides of Ba, Sr, and Ca activates or increases, in the order named, the life of Ni catalysts.  The weekly alkaline catalysts of pure Ni, Ni-alkaline earths, and Ni-ThO₂, prepared by reducing the hydroxides, are almost completely inactive.  The Ni-Al₂O₃ catalyst, however, is highly active, yet when prepared by calcining the nitrate it is inactive.  On the other hand, nitrate-prepared Ni, Ni-alkaline earths, and Ni-ThO₂ are active.  The best catalysts are mixtures of 90% Ni and 10% Al₂O₃ or ThO₂.  Additions of alkaline earths, particularly of BaO, increase many times the activity of the catlaysts prepared from the nitrate.  Addition of Co greatly decreases the activity of Ni, while Cu makes it completely inactive.  Reviews literature briefly.

      BRUDE, G.  See abs. 900, 901.

      BRUNAUER, S.  See abs. 822, 823, 824, 825, 826, 827, 836, 2215, 2216.