Coupling reaction of dimethyl succinate and ethylene carbonate over zinc oxide

doi:10.3969/j.issn.0438-1157.2012.11.021

CIESC Journal ›› 2012, Vol. 63 ›› Issue (11): 3525-3530.DOI: 10.3969/j.issn.0438-1157.2012.11.021

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Coupling reaction of dimethyl succinate and ethylene carbonate over zinc oxide

MA Kai^1,2, LIU Shaoying¹, LI Jianguo¹, YAO Jie¹, WANG Gongying^1,3

1. Chengdu Institution of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China;
3. Changzhou Key Laboratory of Green Chemistry and Technology, Changzhou Institute of Chemistry, Changzhou 213164, Jiangsu, China

Received:2012-03-27 Revised:2012-08-06 Online:2012-11-05 Published:2012-11-05
Supported by:
supported by the National Science & Technology Pillar Program of China(2011BAZ03281).

氧化锌催化丁二酸二甲酯和碳酸乙烯酯的耦合反应

马楷^1,2, 刘绍英¹, 李建国¹, 姚洁¹, 王公应^1,3

1. 中国科学院成都有机化学研究所, 四川成都 610041;
2. 中国科学院研究生院, 北京 100049;
3. 常州化学研究所常州市绿色化学与技术重点实验室, 江苏常州 213164

通讯作者: 刘绍英
作者简介:马楷(1984-),男,博士研究生。
基金资助:
国家科技支撑计划项目(2011BAZ03281)。

Abstract

Abstract: A new technology of synthesis of poly(ethylene glycol succinate)(PES)oligomers and dimethyl carbonate(DMC)by coupling reaction of ethylene carbonate(EC)and dimethyl succinate(DMSu)over ZnO was studied.The effect of calcination temperature of ZnO catalysts on catalytic activity was investigated and ZnO catalysts were characterized with XRD,BET and NH₃-TPD.PES oligomers were characterized with FTIR and ¹H NMR.The preferable reaction conditions were as follows:reaction temperature 225-235℃,molar ratio of EC to DMSu 2,molar ratio of catalyst to the total mass of EC and DMSu 0.005,reaction time 3 h.Under these conditions,the yield of DMC was 59.7%,the intrinsic viscosity of PES oligomer was 0.3857dl·g^-1.The catalytic activity of coupling reaction was affected possibly by the degree of crystallization and the weak acid sites on the surface of ZnO.

Key words: ZnO, polyethylene glycol succinate, coupling reaction, ethylene carbonate, dimethyl succinate, dimethyl carbonate

摘要： 研究了ZnO催化碳酸乙烯酯和丁二酸二甲酯耦合反应合成聚丁二酸乙二醇酯预聚体和碳酸二甲酯的新工艺。考察了ZnO催化剂焙烧温度对耦合反应的催化活性,优化了反应条件。并对ZnO催化剂进行XRD、BET和NH₃-TPD表征。以FTIR和¹H NMR表征聚丁二酸乙二醇酯预聚体。结果表明,在225~235℃,EC/DMSu摩尔比为2,催化剂/(EC+DMSu)摩尔比为0.005,反应时间为3 h的反应条件下,碳酸二甲酯收率为59.7%,聚丁二酸乙二醇酯预聚物的特性黏度为0.3857 dl·g^-1。通过XRD和NH₃-TPD分析,推测ZnO表面的晶体缺陷和弱酸性是影响耦合反应催化活性的原因。

关键词: ZnO, 聚丁二酸乙二醇酯, 耦合反应, 碳酸乙烯酯, 丁二酸二甲酯, 碳酸二甲酯

CLC Number:

O631.5

MA Kai, LIU Shaoying, LI Jianguo, YAO Jie, WANG Gongying. Coupling reaction of dimethyl succinate and ethylene carbonate over zinc oxide[J]. CIESC Journal, 2012, 63(11): 3525-3530.

马楷, 刘绍英, 李建国, 姚洁, 王公应. 氧化锌催化丁二酸二甲酯和碳酸乙烯酯的耦合反应[J]. 化工学报, 2012, 63(11): 3525-3530.

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Coupling reaction of dimethyl succinate and ethylene carbonate over zinc oxide

氧化锌催化丁二酸二甲酯和碳酸乙烯酯的耦合反应

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