2423.     NEGISHI, R., AND KAMIIKE, O.  Hydrocarbons From Carbide.  V.  Noncatalytic Polymerization Under Ordinary Pressure Acetylene-Carbide Systems.  Jour. Soc. Chem. Ind. (Japan), vol. 45, suppl. binding, 1942, p. 46 (in English); Chem. Abs., vol. 44, 1950, p. 10299.

        Effects of C2H2 used as a carrier of water vapor on the liquid yield were studied in the hope that the total liquid yield might be increased by the polymerization of the introduced C2H2 and, further, that by its introduction, the formation of free C2H2 from the carbide might be suppressed, thus permitting the nascent C2H2 to become more readily available for the liquid synthesis.  when the concentration of C2H2 was high, the total liquid yield also was high, showing that a part of the introduced C2H2 was polymerized.  When its concentration was reduced, for example, by diluting it with H2, or CO2, the yield fell.  In the presence of C2H2 mol., the formation of free C2H2 from the carbide is suppressed.