536. ------. [DREYFUS, H.] (C. Bonard, administrator of the estate of H. Dreyfus). Improvements in Exothermic Chemical Reactions. United States Patent 2,393,240, Jan. 22, 1946; appl. filed June 27, 1942, Serial No. 448,837, in Great Britain May 15, 19

Patent Abstracts

536. ------. [DREYFUS, H.] (C. Bonard, administrator of the estate of H. Dreyfus). Improvements in Exothermic Chemical Reactions. United States Patent 2,393,240, Jan. 22, 1946; appl. filed June 27, 1942, Serial No. 448,837, in Great Britain May 15, 1941; 4 claims (Cl. 260-524). Chem. Abs., vol. 40, 1946, p. 2164.

Chemical reactions, especially strongly exothermic ones, are carried out in the presence of a solid catalytic material mixed with a material of little or no catalytic activity, both materials being in the form of granules with their surfaces exposed to the substances taking part in the chemical reaction. The 2 materials may be arranged in layers varying in number and thickness. For instance, at the beginning of the reaction zone there may be more or thicker layers of material of little or no catalytic activity than catalyst, farther along the 2 materials may be in layers of equal number and thickness, whereas still farther along the number or thickness of the catalyst layers may be greater or only catalyst may be present. The inventions not limited to oxidation reactions but may be used in the synthesis of hydrocarbons from oxides of C and H₂ whether an Fe- Ni-, or Co-type of catalyst is used.