1100.    FROLICH, P. K., DAVIDSON, R. L., AND FENSKE, M. R.  Catalysts for the Formation of Alcohols From Carbon Monoxide and Hydrogen.  III.  X-Ray Examination of Methyl Alcohol Catalysts Composed of Copper and Zinc.  Ind. Eng. Chem., vol. 21, 1929, pp. 109-111; Chem. Age, vol. 20, 1929, p. 187; British Chem. Abs., 1929, A, p. 406; Chem. Abs., vol. 23, 1929, p. 1342.

        Zn oxide is partly reducible at 200°-220° in a stream of MeOH vapor, particularly when in admixture with Cu oxide.  The exothermic reduction of the latter oxide may furnish the necessary energy for the partial reduction of the Zn oxide.  An attempt has been made to ascertain by X-ray examination if the Zn oxide is reduced to the metallic state.  It has not been possible to prove the presence of metallic Zn, although there are indications that it is present.  The complete series of Zn oxide – Cu catalysts studied (from pure oxide to pure Cu) all possess the characteristic crystal structure of the 2 components.  The cell-unit sizes of both Cu and Zn oxide are markedly influenced by the presence of the other constituent.  The selective activity of these catalysts appears to be related in some way to the distance separating the atoms of their constituents.