2523. NATTA, G., AND BEATI, E. Production of Aldehydes. British Patent 646,424, Nov. 22, 1950. Chem. Abs., vol. 45, 1951, p. 5714.

Aliphatic and cycloaliphatic aldehydes are obtained from olefins and cycloalkenes (boiling not below the reaction temperature), H₂ and CO at a temperature above 80° and at a pressure of 10-50 atm. in the presence of a Co-containing catalyst. A preferred catalyst is partly reduced CoO activated with up to 2% Fe₂O₃ and supported on a carrier. Thus, to Me (CH₂) ₁₅CH:CH₂ 1 and catalyst 0.1 kg. (obtained by partial reduction of basic carbonates of Co 98% and Fe 2% with H₂ at 350°) in a 3-1. tank are added CO and H₂ at a pressure of 12 atm. The mixture is heated at 100°-110° and the addition of CO and H₂ continued until absorption ceases, to yield mainly Me (CH₂) ₁₆CHMeCHO and Me(CH₂) ₁₈CHO containing small quantities of the corresponding alcohols. Gives other examples.