PATENTS

      175.            BERGIUS, F.  Gases for Hydrogenation.  United States Patent 1,699,177, Jan. 15, 1929: appl. filed Nov. 30, 1925.  Chem. Abs., vol. 23, 1929. p. 1252.

Waste hydrogenation gas, such as that from the hydrogenation of coal, is subjected to steam treatment in 2 successive stages at different temperatures: in the 1^st stage the higher temperature is used (suitable about 1,100°), which is high enough to decompose CH₄ in the absence of a catalyzer and to cause formation of CO and H₂; the 2d stage may be effected at a temperature of about 300°-500° in the presence of a catalyzer such as Fe oxide adapted to enhance the reaction between CO and steam.  Describes arrangement of apparatus.