2070. ------. [LODER, D. J.] (E. I. du Pont de Nemours & Co.). Synthesis of Organic Acids Higher Than Acetic Acid. United States Patent 2,162,459, June 13, 1939. Chem. Abs., vol. 33, 1939, p. 7820.

Process for the preparation of acids, such as propionic acid and their esters, involves treating CO in the presence of a volatile catalyst containing B and F atoms, such as BF₃, with a saturated aliphatic monohydric alcohol, such as EtOH, containing at least 2 C atoms or compounds which give such alcohols upon hydrolysis.