2068. ------. [LODER, D. J.] (E. I. du Pont de Nemours & Co.). Propionic Acid. United States Patent 2,170,825, Aug. 29, 1939; appl. filed Jan. 27, 1938, Serial No. 187,226; 8 claims (Cl. 260-532). Chem. Abs., vol. 34, 1940, p. 116.

PATENTS

2068. ------. [LODER, D. J.] (E. I. du Pont de Nemours & Co.). Propionic Acid. United States Patent 2,170,825, Aug. 29, 1939; appl. filed Jan. 27, 1938, Serial No. 187,226; 8 claims (Cl. 260-532). Chem. Abs., vol. 34, 1940, p. 116.

EtOH is treated with CO in the presence of BF₃and H₂O, as the catalyst, at 125°-180° and under a pressure of over 25 atm. (suitably 800-900 atm. at 135°-165°).