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Patent Abstracts

      320.     ------.  [CARPENTER, G. B.]  (E. I. du Pont de Nemours & Co.).  Aliphatic Carboxylic Acids.  United States Patent 1,924,767.  Aug. 29, 1933: appl. filed Aug. 24, 1931.  Serial No. 559,123: 13 claims (Cl. 260-116).  Chem. Abs., vol. 27, 1933. p. 5340.

In the production of an acid such as propionic acid from steam, CO, and an olefinic hydrocarbon such as C2H4, a metal halide such as NaBr or ZnCl2 is used as a catalyst.