碳酸二甲酯与苯酚酯交换反应动力学研究  

The reaction kinetics of transesterification from dimethyl carbonate and phenol

作　　者：顾凯杰 朱志庆[2] 沈卫华[2] 方云进[1] Gu Kaijie;Zhu Zhiqing;Sheng Weihua;Fang Yunjin(State Key Laboratory of Chemical Engineering,East China University of Science&Technology,Shanghai 200237,China;School of Chemical Engineering,East China University of Science&Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237 [2]华东理工大学化工学院,上海200237

出　　处：《石油化工》2018年第3期213-218,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(21576083)

摘　　要：采用自制钛催化剂,研究了碳酸二甲酯与苯酚反应生成甲基苯基碳酸酯的反应动力学,考察了反应温度对苯酚转化率的影响,确定了碳酸二甲酯与苯酚反应的热力学和动力学数据,建立了动力学模型并进行了统计学检验。实验结果表明,在自制钛催化剂用量为0.28%(w)、438~468 K条件下,碳酸二甲酯与苯酚生成甲基苯基碳酸酯反应的二级动力学方程对实验数据拟合良好,正反应速率常数的指数前因子为2.70×10~3 L/(mol·min),逆反应速率常数的指数前因子为6.08×10~2 L/(mol·min),反应热为35.95 k J/mol,反应熵为12.72 J/(mol·K)。The reaction kinetics of methyl phenyl carbonate from dimethyl carbonate(DMC)and phenol which catalyzed by self-made titanium catalyst was investigated.The influence of reaction temperature on the conversion of phenol was investigated.The data of reaction thermodynamics and kinetics of DMC and phenol were determined.A second order reaction kinetics of model was established and a statistical test was carried out.It was found that,catalyzed by self-made titanium catalyst(0.28%(w)),the reaction model was well fitted to the experimental data,the pre-exponential factor of positive reaction rate constant of methyl phenyl carbonate from DMC and phenol is 2.70×103 L/(mol·min),and the pre-exponential factor of negative reaction rate constant is 6.08×102 L/(mol·min)under the temperature range of 438-468 K.The heat and entropy of the reaction are 35.95 kJ/mol and 12.72 J/(mol·K),respectively.

关 键 词：酯交换 甲基苯基碳酸酯 动力学 碳酸二甲酯 

分 类 号：TQ225.52[化学工程—有机化工]