961. ------. [HEINEMANN, A.] [Production of Formaldehyde.] Austrian Patent 100,450, no date. Chem. Zentralb., 1925, II, p. 2575.

A gas mixture consisting of Co, H₂, and steam is passed at 240º-350º over a porous catalyst of Cu or Ni on porcelain, asbestos, coke, charcoal.

See British Patent 179,951 (abs. 956), French Patent 551,222 (abs. 959), and United States Patent 1,460,244 (abs. 958).