稀土固体超强酸SO42-/ZrO2-SnO2-Nd2O3的制备及催化合成乙酸松油酯

采用分沉淀-共浸渍法制备了新型稀土固体超强酸SO42-/ZrO2-SnO2-Nd2O3，利用IR、TG-DTA、XRD表征了催化剂的物化性质，并用于催化乙酸酐和松油醇合成乙酸松油酯，显示了良好的反应活性和重复使用性，对反应条件进行了优化，结果表明最佳反应条件为：松油醇和乙酸酐的摩尔比1∶1.5，反应温度50 ℃，反应时间5 h，催化剂用量占松油醇质量的2 %，在此反应条件下松油醇的转化率为93%左右，产物中乙酸松油酯的含量为87%。催化剂失活主要原因是有机物在表面吸附，通过无水乙醇洗涤，干燥，即可再生。

Preparation of rare earth solid superacid SO42-/ZrO2-SnO2-Nd2O3 and synthesize terpinyl acetate

Rare earth solid superacid catalyst SO42-/ZrO2-SnO2-Nd2O3 was prepared by deposition-steeping method, characterized by IR, TG-DTA and XRD, and used to synthesize terpinyl acetate, the results show that the catalyst SO42-/ZrO2-SnO2-Nd2O3 has excellent reactivity and reusing ability. Factors influencing the esterification reaction were investigated, and the optimum reaction conditions have been found: the mol ratio between terpineol and acetic anhydride was 1.0∶1.5, the reaction temperature and time were 50 ℃ and 5 h, catalyst quality was 2 % of the terpineol. Under the condition of optimum technology, the conversion of terpineol is about 93%, the content of terpinyl acetate in the product is 87%. The main reason of catalyst deactivation is activate sites were covered by organic materials coming from reacting solution, can regenerate by alcohol washed and then dried at 120℃ for 12h.