3760.     ZELINSKIĬ, N. D.  [New Syntheses of Hydrocarbons From Carbon Monoxide.]  Doklady Akad. Nauk S.S.S.R., vol. 60, 1948, pp. 235-237; Chem. Abs., vol. 42, 1948, p. 6510.

        Occurrence of free CH2 radicals in the Fischer-Tropsch synthesis is considered demonstrated by the methylation of C6H6 introduced into the reaction mixture, to PhMe, and the proof that these radicals actually originate from CO+H2.  Comparative kinetic studies of the rates of formation of hydrocarbons from CO+H2, of formation of carbide in the reaction between CO and the catalyst, and of the reduction of the carbides by H2, have demonstrated that intermediate carbide formation plays a role only on Fe catalysts, not on Co and on Ni.  The Fischer-Tropsch reaction proceeds by way of the intermediate radical CHOH and CHOH+H2→H2+CH2.  Closely related to this mechanism is the catalytic hydrocondensation of CO with olefins (C2H4, C3H6, C4H8, etc.) to saturated and unsaturated aliphatic hydrocarbons, and the catalytic hydropolymerization of olefins to saturated and unsaturated aliphatic hydrocarbons, occurring only in the presence of some (5-7%) CO.  It is obvious that these reactions are determined by intermediate formation of CH2 radicals.  (See abs. 785, 792, 795, and 3761.)

        ----------.  See abs. 793, 794, 795, 796, 797, 798, 799, 800, 801, 802, 802b, 802c, 803, 1704, 1705, 2916, 3558.