2009. ------. [LARSON, A. T.] (E. I. du Pont de Nemours & Co.). Synthesis of Organic Acids From Olefinic Hydrocarbons, Water, and Carbon Monoxide. United States Patent 2,079,216, May 4, 1937; appl. filed Mar. 25, 1933, Serial No. 662,854; 4 claims (Cl. 260-116). Chem. Abs., vol. 31, 1937, p. 4345.

For the production of an aliphatic monocarboxylic acid such as propionic acid, an olefin such as C₂H₄ is reacted with H₂O and CO (suitably at a temperature of about 325° and under a pressure of about 700 atm.) in the substantial absence of O₂ in a vessel, the inner surfaces of which are lined with a metal containing at least 95% Cu.