PATENT

3394. ----- [SOCIÉTÉ CHIMIQUE DE LA GRANDE PAROISSE, AZOTE ET PRODUITS CHIMIQUES.]  [Synthesis of Formaldehyde.]  Belgian Patent 342,025, no date.  Das Kohlenoxyd, by J. Schmidt.  Akad. Verlagsgesell., Leipzig, 1950, p. 230.

From CO and steam at 200°-600° and raised pressure in presence of Mg, Mn, Sn, Sb, or their oxides or salts.

See French Patent 630,483 (abs. 3388).