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Return to Abstracts of Patents Return to Abstracts of Patents 1000-1249 Patent Abstracts1240. ------. [I. G. FARBENINDUSTRIE A. G.] [Gas Reactions.] French Patent 674,457, May 2, 1929. Chem. Abs., vol. 24, 1930, p. 2515. In carrying out reactions at a high temperature with gases such as H2, CO, or H2S, which attack the metal of the apparatus, a small quantity of a substance, which is liquid at the temperature of reaction, is added to the gas so that the apparatus becomes covered with a film of liquid. See French Patent 643,127. |