管式反应器中环己烯氧化制环氧环己烷

以过氧化氢为氧化剂，自制的十六烷基吡啶过氧磷钨酸为催化剂催化环己烯合成环氧环己烷，根据釜式反应器反应的最佳时间确定了管式反应器的管长，考察了反应温度、环己烯与H₂O₂物质的量比、反应溶液的pH和催化剂用量对产物收率的影响，并对这些条件进行了优化。实验结果表明，管式反应器最佳条件为反应温度50℃，反应时间30 min，投料比n（环己烯）：n（H₂O₂）：n（催化剂）：n（氯仿）=1：0.75：0.000 25：2，pH=3，此条件下环氧环己烷的收率可达55.24%。同样实验条件下釜式反应器内环氧环己烷收率为44.42%。

Conversion of cyclohexene to epoxycyclohexane in a tubular reactor

Epoxycyclohexane has been synthesized from cyclohexene with H₂O₂ as the oxidant and hexadecylpyridinium peroxophosphotungstate made by a modified method as a catalyst. The length of the tubular reactor employed was determined by the optimum reaction time when using a tank reactor. The effects of varying reaction temperature, ratio of cyclohexene to H₂O₂, pH, and amount of catalyst were investigated and the reaction conditions were optimized. The yield of epoxycyclohexane reached 55%, under the optimized conditions, which were a reaction temperature of 50 ℃, a reaction time of 30 min, a molar feed ratio n(cyclohexene):n(H₂O₂):n(catalyst):n(chloroform)=1:0.75:0.000 25:2, pH=3. Under the same experimental conditions, the yield of epoxycyclohexane in the tank reactor was 44%.