2779. ----- [RICARD, E.] (Usines de Melle). Process of Manufacturing Formaldehyde by Electrosynthesis From Carbon Monoxide and Hydrogen. United States Patent 2,205,542, June 25 1940, appl. Filed Dec. 24, 1936, Serial No. 117,614; in France, Dec. 24, 19

PATENTS

2779. ----- [RICARD, E.] (Usines de Melle). Process of Manufacturing Formaldehyde by Electrosynthesis From Carbon Monoxide and Hydrogen. United States Patent 2,205,542, June 25 1940, appl. filed Dec. 24, 1936, Serial No. 117,614; in France, Dec. 24, 1935; 4 claims (Cl. 204-31). Chem. Abs., vol. 34, 1940, p. 7187.

HCHO may be prepared by introducing CO and H₂ into an electric glow discharge zone while maintaining a gas pressure of less than 0.15 atm. A charge of 0.05-0.3 milliamps. per cm³. of cross-sectional area of the reaction tube is advantageous.