磷钨酸铈催化合成苯甲醛乙二醇缩醛

Synthesis of Benzaldehyde Glycol Acetal Catalyzed by CePW_(12)O_(40)

以自制的磷钨酸铈为催化剂,通过苯甲醛和乙二醇为原料合成了苯甲醛乙二醇缩醛,并探讨了其催化活性,研究了反应物料配比、催化剂用量、反应时间、催化剂重复使用性能等因素对反应的影响.实验结果表明:合成苯甲醛乙二醇缩醛较适宜的反应条件为:苯甲醛0.1 mol,n(苯甲醛)/n(乙二醇)=1.0/1.7,催化剂用量为反应物料总质量的1.0%,甲苯为带水剂,反应时间2.0 h.上述条件下,苯甲醛乙二醇缩醛的产率可达79.5%.

Benzaldehyde glycol acetal was synthesized from benzaldehyde and ethylene glycol in the present of CePW12O40. The factors influencing the synthesis were discussed and the better conditions were found as follows： based on 0.1 mol benzaldehyde , the molar ratio of benzaldehyde to ethylene glycol is 1.0/1.7, the quantity of catalyst is equal to 1.0% of the feed stock, the amount of tulene 10 mL and the reaction time is 2.0 h. Under the above conditions its yield can reach over 79.5 %.