PATENTS

      1539.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Reducing Oxides of Carbon.]  French Patent 805,696.  Nov. 26, 1936.  Chem. Abs., vol. 31, 1937. p. 4461.

            In catalytic treatment of oxides of C and H₂, the catalysts are formed of metal parts of apparatus, the surface of which entering in contact with the reacting gases is cleaned, preferably in the presence of activators, these parts being at the same time swept interiorly or exteriorly by a heating or cooling medium.