氯化铈催化合成苯甲醛乙二醇缩醛  

Catalytic Synthesis of Benzaldehyde Ethylene Glycol Acetalby Cerous(Ⅲ) Chloride Heptahydrate

作　　者：郭春燕[1] 黄占凯[1] 刘春生[1] 罗根祥[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《稀土》2005年第2期19-21,共3页Chinese Rare Earths

摘　　要：以环境友好试剂氯化铈为催化剂,对苯甲醛与乙二醇的缩合反应进行了研究,考察了该绿色催化剂的用量、醇醛摩尔比、带水剂等因素对苯甲醛与乙二醇缩醛收率的影响。实验结果表明,氯化铈有较好的催化活性。在回流条件下,催化剂用量约占醛用量的0.8%摩尔分数,醇醛摩尔比为1.5∶1,带水剂环己烷的用量为10mL时,反应120min,苯甲醛与乙二醇缩醛收率达79.6%。The acetal was synthesized in high yield by the reaction of benzaldehyde with ethylene glycol in the presence of a new environmentally friendly catalyst CeCl_3·7H_2O.The obtained results indicated that CeCl_3·7H_2O possessed a fairly high catalytic activity for this acetalization reaction.In this article ,the factors influencing the synthesis were discussed and the best conditions were determinded. The optimum conditions are as follows: the molar ratio of ethylene glycol to benzaldehyde is 1.5∶1, the molar ratio of catalyst to benzaldehyde is 0.8%; cyclohexane, better water-carrying agent to the reaction is 10 mL; reaction time is 120 min. Under the above conditions ,the yield of benazldehyde ethylene glycol acetal is up to 79.6 %.The results showed CeCl_3·7H_2O is an excellent catalyst for synthesizing benazldehyde ethylene glycol acetal.

关 键 词：苯甲醛乙二醇缩醛 氯化铈 催化 

分 类 号：O614.33[理学—无机化学] O643.3[理学—化学]