氯化锌直接催化α-蒎烯异构制备莰烯反应规律研究

Study on the synthesis of camphene by isomerization ofα-pinene using ZnCl_2 as catalyst

研究了以无机氯化物为催化剂催化α-蒎烯异构制备莰烯的反应规律,考察了催化剂种类、催化剂用量、反应时间、反应温度对异构反应的影响,确定了最佳的反应条件。在最佳反应条件下,即以氯化锌(ZnCl2)为催化剂,用量占α-蒎烯质量的3%,α-蒎烯用量2.86g,温度140℃,反应时间10h,α-蒎烯异构化反应转化率为94.64%,莰烯选择性为50.42%。

Isomerization of a-pinene catalyzed by inorganic chloride was studied. The influences of cata lyst amount, reaction time and temperature were investigated. Under optimum reaction conditions, such as a-pinene 2.86 g,w（ZnC12） ： w （a-pinene）=3 ： 100; temperature, 140 ℃ ; reaction time 10 h, the conversion of a-pinene was 94. 64% ,the selectivity of camphene was 50.42%.