PATENTS

      1535.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Recovery of Hydrogenation Gas.]  Austrian Patent 118,058. June 10, 1930: appl. filed June 11, 1926.  Chem. Zentralb., 1930. II. p. 1313.

            Hydrocarbon-containing gases, after addition of the necessary amount of O₂ or O₂-containing gas for complete combustion, are burned in the presence of catalysts with or without the presence of steam or CO₂, and the CO formed is wholly or partly removed from the reaction mixture.  In this manner the waste gases of hydrogenation are made useful.