摘要
利用微波辐射加热法,以氯乙酸与异丙醇为原料,丝光沸石为催化剂,合成氯乙酸异丙酯.考察微波功率、加热时间、催化剂用量、酸醇摩尔比等因素对反应的影响.通过正交实验得出合成氯乙酸异丙酯的最佳工艺条件:微波功率为480W,加热时间为80min,催化剂的用量为4g·mol-1,n(酸)∶n(醇)=2∶1,此条件下氯乙酸异丙酯的产率为64.1%;各种因素对酯化反应影响的重要性次序为:微波功率>加热时间>酸醇摩尔比>催化剂用量.对比实验结果表明,采用微波辐射加热法合成氯乙酸异丙酯的反应速度至少是常规加热法的5倍.
Isopropyl chloroacetate is synthesized from chloroacetic acid and isopropyl alcohol with mordenite as catalysts under the irradiation of microwave. It is investigated that the effects of microwave power(P), irradiation time (T), the amount of catalyst and molar ratio of acid-alcohol on the process. Meanwhile, the optimum operation conditions are obtained by orthogonal experiment and are as follows: microwave power is 480 W, irradiation time is 80 min, the amount of catalyst is 4.0 g5mol^(-1), molar ratio of acid to alcohol is 2.0, the yield of isopropyl chloroacetate is 64.1 %. Comparing with conventional heating method, the heating time under microwave irradiation is less than 1/5 of the former.=
出处
《沈阳化工学院学报》
2004年第2期85-88,共4页
Journal of Shenyang Institute of Chemical Technolgy
基金
沈阳化工学院中青年科研起动基金资助课题(200105)
关键词
微波
氯乙酸
氯乙酸异丙酯
丝光沸石
microwave
esterification
isopropyl chloroacetate
zeolite.
