<正>研究了固体超强酸SO2-4/ZrO2催化剂的制备条件(硫酸浸渍浓度、焙烧温度等)对其催化性能的影响。结果表明,催化剂的制备条件不同,对莰烯选择性和α 蒎烯转化率有较大影响。适宜的催化剂制备条件是:硫酸浓度0.5～1.0mol/L,焙烧温度650℃。对所制备的SO2-4/ZrO2固体超强酸作为α 蒎烯异构反应的催化剂,以及对影响反应过程的主要因素进行探讨。优化的工艺条件为:反应时间1～3h,反应温度(130±2)℃,催化剂质量分数3%～4%。该条件下α 蒎烯转化率96.4%,莰烯选择性49.7%。此外,还分析了催化剂放置时间对异构产物的影响及催化剂重复使用情况。

SO~(2-)_4/ZrO_2 type of solid superacids was prepared and then used as the high-activity catalysts of α-pinene isomerization.The products of isomerization reaction were identified by using GC-MS.In the isomerization reaction,the main product is camphene,and by-products are α-terpinene and tricyclene.The effects of conditions for preparation of (SO~(2-)_4/ZrO_2) catalysts,such as concentration of H_2SO_4,calcination temperature with respect to its catalytic activity,were investigated.The results showed that the optimum conditions for the preparation of SO~(2-)_4/ZrO_2 catalysts were as follows:calcinations temperature was 650 ℃,and the H_2SO_4 concentration used to treat the catalyst was 0.5～1.0 mol/L.At these conditions,the main factors affecting the reaction were investigated in the work.The optimum conditions for α-pinene isomerization reaction were as follows:reaction time was 1～3 h,isomerization temperature was(130±2)℃,and the ratio of solid superacids(W/W) to α-pinene 3%～4%.Under these conditions,the α-pinene conversion was 96.4%,and the camphene selectivity was (49.7%).Furthemore,the effects of storage time of the catalysts on the reaction were discussed,and the regeneration experiments of catalysts were carried out.