アセトンの熱分解によるケテンの合成(第3報)

アセトン熱分解に及ぼす二硫化炭素の影響

抄録

In order to clarify the effect of addition of carbon disulfide to acetone for the thermal decomposition of acetone into methane and ketene, and the thermal decomposition of ketene, thermal decomposition was carried out by the current method of heating at 650-750°c with addition of 0-0.5% carbon disulfide to acetone. Although acetone was completely decomposed into methane and ketene without dehydrogenation reaction even with no addition of disulfide but carbonization of ketene was accompanied in this case. The formation of ethylene and ethane was very small and that of hydrogen was high. In this case, the yield of ketene was much influenced by the temperature and the lower the temperature less was the yield. The carbonization decomposition of ketene could be suppressed by the addition of carbon disulfide, above 0.05 vol% of which was not depended on the amount of addition. By setting the general decomposition reaction of ketene is the first order reaction, the decomposition reaction constant of ketene without the presence of carbon disulfide was 2-4 times greater than the case of its addition and its activation energy became approximately to 1/2.