磁性SO_4^(2-)-ZrO_2固体超强酸催化合成丁酸丁酯的研究

Study of Magnetic Solid Superacids for Catalytic Synthesis of Butyl Butyrate

利用磁性对固体超强酸组装 ,制备出磁性SO2 -4 -ZrO2 固体超强酸催化剂 ,应用于丁酸丁酯的合成反应中。最佳反应条件为 :正丁醇 0 36mol,丁酸 0 2mol,磁性催化剂 1 0g ,带水剂甲苯 15mL ,反应温度为回流温度 ,反应时间 2 0h ,酯化率可达 96 4%。利用催化剂的磁性可将催化剂迅速分离 ,回收率达 83 2 % 。

Magnetic solid superacids SO 2- 4-ZrO 2 was prepared by chemical modification on solid superacids.It was used as catalyst in the esterification reaction.The yield of esterification achieved 96.4%with 0.36 mol butyl alcohol,0.2 mol butyric acid,1.0 g magnetic solid superacids and 15 mL toluene as entrainer reacting at reflux temperature for 2.0 h.The catalyst could be isolated from other materials by magnetic separation and the recycle rate was 83.2%.