3926.  WEITZEL, R., AND SPEER, W. (I.G. Farbenindustrie A.G.). Hydrogenation of Oxides of Carbon. Canadian Patent 284,235, Oct. 23, 1928. Chem. Abs., vol. 23, 1929, p. 604.

Catalysts for the reduction of oxides of C, in addition to Fe, Ni, or Co or compounds of these, contain Cd, Tl, or their compounds or mixtures of these substances. Such catalysts are effective at 180° -200° , but preferably the process is carried out at 250° -350° ; the catalysts may be used at temperatures of about 400° . Admixture of the Cd or Tl prevents deposition of soot on the catalyst. Elements of group S of the periodic system also give, in combination with Cd or Tl, a similar action to that given by Fe, Ni, or Co. The activity of the catalysts is assisted by addition of substances such as Cu, Au, Ag, Ce, Zr, Al, V, U, Cr, Mo, W, Mn, alkali metals and alkaline-earth metals, or compounds of these, provided the metal compounds containing O, which are difficulty reducible to the metal are absent or present in amount not exceeding 5%, preferably <1% of the catalytically active material. The process may be carried out at ordinary or elevated pressure. According to the conditions of working as regards temperature, pressure, composition of the gases, catalysts, and the like, solid liquid or gaseous hydrocarbons may be produced or also products containing O or mixtures of these.