3457.     TROPSCH, H., AND KASSLER, R.  [Catalytic Properties of Rhenium.]  Ber. deut. chem. Gesell., vol. 63 B, 1930, pp. 2149-2151; Chem. Abs., vol. 25, 1931, p. 22.

        Reduced Re and Re-Cu catalysts act as hydrogenating catalysts in the reactions CO→CH₄ and C₂H₄→C₂H₆.  At 470°, Re carbide is formed by passing CO over a Re-Cu catalyst.