2416.     ----------------.  [NEGISHI, R., AND KAMIIKE, O.]  Hydrocarbons From Carbide.  III.  Noncatalytic Polymerization Under Ordinary Pressure.  Systems of Calcium Carbide With Carbon Dioxide, Carbon Monoxide, and Hydrogen Chloride.  Bull. Chem. Soc. Japan, vol. 17, 1942, pp. 244-251; Chem. Abs., vol. 41, 1947, pp. 4434-4435.

        Effects of CO, CO₂, and HCl on the synthesis of hydrocarbon liquids directly from Ca carbide in the temperature range of 340°-420° have been studied.  The results are in agreement in general with those in the H₂ system.  The main reaction of the nascent C₂H₁ molecules is only slightly affected by the carrier gases.  In the CO₂ system, the yield of liquid products has been found as high as 43% of the total reacted C₂H₂, CO₂ takes part only in the formation of CaC₂.  The presence of H₂ seems to have no effect on the character of the liquid products.  Whereas CO₂ has favorable effects, CO has unfavorable effects, and HCl has no effect at all on the yield of liquid hydrocarbons.