728. ------. [FOHLEN, J. L.] Manufacture of Formaldehyde. United States Patent 2,111,469. Mar. 15, 1938: appl. filed Dec. 31, 1935. Serial No. 57,063, in Great Britain Jan. 5, 1935: 10 claims (Cl. 260-138). Chem. Abs., vol. 32, 1937, p. 3773.

Patent Abstracts

728. ------. [FOHLEN, J. L.] Manufacture of Formaldehyde. United States Patent 2,111,469. Mar. 15, 1938: appl. filed Dec. 31, 1935. Serial No. 57,063, in Great Britain Jan. 5, 1935: 10 claims (Cl. 260-138). Chem. Abs., vol. 32, 1937, p. 3773.

In producing HCHO from CO and H₂ these gases, after treatment for removal of catalyst poisons, are passed at 180º-225º C. over Ni particles deposited on a metal support and aided by a metal promoter.