798.    EIDUS, Y. T., ZELINSKIĬ, N. D., AND ERSHOV, N. I.  [Condensing Action of Methylene Radicals on Ethylene.]  Compt. Rend. Acad. Sci. U.R.S.S., vol. 60, 1948, pp. 599-601; Chem. Abs., vol. 43, 1949, p. 108.

                 In hydropolymerization of C₂H₄, the most important role is played by the CH₂ radicals.  Using, as a source of CH₂ radicals, molecules of CO in the course of hydrogenation, a new reaction of catalytic hydropolymerization of C₂H₄ was discovered, which proceeds only in the presence of small amounts of CO. With an equimolecular mixture of C₂H₄ and H₂, containing 4-7% CO, and a space velocity 100 at 190° at atmospheric pressure, intensive hydropolymerization takes place on the catalyst surface; selection of the conditions may restrict hydrogenation of C₂H₄ to 25-30% of the total reaction.  The yields of liquid hydrocarbons reach 400-500 ml. per m.³ or 30-45 ml. per hr.  Distillation of a typical run showed the presence of 54% butylene, 4.1% butane, 19% propylene, 3.3% propane, 18.2% ethane, and 1.1% C₂H₄, in addition to which appreciable amounts (up to 60-65%) of C₅-C₈ hydrocarbons are formed.  Increase of the CO content 0.06-6.1% increases the amount of heavy oil (in ml. per m.³) O-61.3.  The light oil reaches a maximum of 193.5 ml. per m.³ at 4% CO, while gas oil (C₄ and lower) reaches a maximum of 153.9 ml. per m.³ at 1.5% CO.  Complete absence of CO led to the failure of formation of any higher oil; only hydrogenation to C₂H₆ took place.