【摘要】 研究了SO42-/TiO2-ZrO2型固体超强酸催化剂的制备及其催化长叶烯的异构反应,通过GC、GC-MS和标样分析,确定其主产物为异长叶烯。结果表明,该催化剂对长叶烯的异构化反应有很高的催化活性和较好的选择性。考察了其催化性能的影响因素。结果表明,适宜的催化剂制备条件是:n(钛)∶n(锆)为3∶1,焙烧温度550℃。长叶烯异构优化的工艺条件:反应时间4h、反应温度165℃、催化剂用量4%。该条件下长叶烯转化率99.1%,异长叶烯得率97.2%。同时考察了催化剂放置时间对异构产物的影响和催化剂重复使用情况。更多还原

【Abstract】 The reactions of isomerization of longifolene catalyzed by SO 2- ₄/TiO₂-ZrO₂ solid superacid are performed. From analyses of GC and GC-MS, the main product is isolongifolene from isomerization. The result shows that this catalyst has a high catalytic activity and a good selectivity to isomerization of longifolene. The factors affecting its catalytic activity are investigated. The result also shows that the optimum conditions for the preparation of SO 2- ₄/TiO₂-ZrO₂ catalysts are as follows: n（Ti）∶n（Zr） 3∶1 , and calcination temperature 550 ℃. Under these conditions, the optimum conditions for isomerization of longifolene are as follows : reaction time 4 h, isomerization temperature 165 ℃, and ratio of solid superacid to longifolene mass part 4 %. Under these conditions, the conversion of longifolene is 99.1 %, and the yield of isolongifolene is 97.2 %. Furthermore, experiments on the effect of storage time of the catalysts on the reaction and the regeneration of catalysts are carried out.更多还原