2418.     ----------------.  [NEGISHI, R., AND KAMIIKE, O.]  Hydrocarbons From Carbide.  V.  Noncatalytic Polymerization Under Elevated Pressure.  Comparison Between Ordinary and Elevated Pressure Reactions.  Bull. Chem. Soc. Japan, vol. 17, 1942, pp. 355-364; Chem. Abs., vol. 41, 1947, p. 4435.

        Effects of species of gases, pressure, and temperature on the character and yield of liquid products in the synthesis of hydrocarbons from Ca carbide under high pressures have been studied.  The yield of liquid products increases with increase of total pressure of the system up to about 100 atm. and then decreases with further increase in the pressure.  In the low-pressure runs, CO has noticeably harmful effects, whereas CO₂ has beneficial effects on the yield of liquid products.  There are slight differences in the yields an the properties of the products under elevated and ordinary pressures, and these differences are explained as owing rather to the effects of the time of contact and temperature than to any change in the mechanism of the polymerization reaction.

                    NEGISHI, R., NIBAYASHI, M., AND KAMIIKE, O.  Hydrocarbons From Carbide; Noncatalytic Polymerization Under Elevated Pressure.  II.  Hydrogen-Carbide and Water Gas-Carbide System.  See abs. 2426.