PATENT

3419. ----- SOCIÉTÉ L’AIR LIQUIDE.  [Apparatus for Carrying out Exothermic Catalytic Reactions]  German Patent 574,000, Apr. 11, 1933: appl. filed Mar. 9, 1929.  Chem. Zentralb., 1934, I, p. 740;  Chem. Abs., vol. 27, 1933, p. 4136.

System for preheating the gases used for the synthesis of NH₃ or for the production of alcohols from CO and H₂.