2870.     ---------------.  [ROELEN, O.]  [Synthesis of Aldehydes and Derivatives From Olefins, Carbon Monoxide, and Hydrogen.]  Angew, Chem., vol. 60, 1948, A, p. 62; British Abs., 1949, A, II, p. 3.

        Reaction of olefins with CO and H2 over Co or Fe, to give aldehydes containing 1 C atom more than the olefin, is described in detail.  C2H4 with CO and H2 in equivalent proportions, with a Co catalyst, at 115 and not less than 100 atm. gives 75% EtCHO.  Byproducts include aldol condensation products and below 100, COEt2.  Above 200, C2H6 and PrOH are obtained over a Co-Cu catalyst.  Only Fe may replace Co as catalyst.  It should be introduced or generated in finely divided form.  The actual catalysts are metal carbonyls, which may replace the metal, thus enabling lower reaction pressures to be used.  Water gas may replace CO and H2.  Production of aldehydes is a general relations of olefins.  Higher olefins react best at 130-150 and give less byproducts than does C2H4.  Unsymmetrical olefins may give a mixture of 2 isomeric aldehydes, but steric factors may suppress the formation of 1 of them.  Aldehydes, C4-C24, can be obtained from the olefins produced in the Fischer-Tropsch synthesis and can be reduced readily, without isolation, over similar Co catalysts to the corresponding alcohols.  Derivatives of these products and their possible industrial applications are listed.  C2H2 and water gas over Co at 140-150 and 10 atm. give 120 gm. per m.3 liquid products.  Chiefly they are unsaturated secondary products of higher molecular weight.  No experimental details.