3789. ----- [VAIL, W.E..] (E. I. du Pont de Nemours & Co.). Formic Acid. United States Patent 1,895,238, Jan. 24, 1933. Chem. Abs., vol. 27, 1933, p. 2457.

Gaseous mixture containing CO and steam is subjected to catalytic reaction in the presence of a B phosphate catalyst.