磷钨杂多酸催化合成戊二酸二甲酯宏观动力学研究  

Study on Kinetics of Dimethyl Glutarate Synthesis Catalyzed by Phosphotungstic Acid

作　　者：孙晓波[1] 栾向海[1] 毛治博[1] 刘焕[1] 刘国际[1] 

机构地区：[1]郑州大学化工学院,河南郑州450001

出　　处：《化学世界》2009年第5期303-305,311,共4页Chemical World

基　　金：河南省基础与前沿技术资助项目(072300420020)

摘　　要：以戊二酸和甲醇为原料,磷钨杂多酸为催化剂,甲苯为带水剂合成戊二酸二甲酯,研究其反应机理,建立了分水条件下酯化合成反应的反应动力学模型,对实验数据回归处理,确定了模型中的有关参数。结果表明,此条件下戊二酸二甲酯的合成表现为三级不可逆反应。在本实验反应体系下,得到了反应的表观活化能为Ea=93.133 kJ/mol,反应速率常数为:k0=2.006×1010e-93133/RT(L/mol)2/min。Dimethyl glutarate was prepared with glutaric acid and methanol as reactant, phosphotungstic acid as catalyst and toluene as azeotropic agent. The reaction mechanism was studied. Kinetic parameters were obtained by experiments carried out at various conditions. Results of experiments showed that the synthetic reaction of dimethyl glutarate appeared to be a third-order irreversible reaction. The rate constant k of the Arrhenius equation was determined. The apparent activation energy was Ea=93.133 kJ/mol, and the frequency factor was k0=2.006×10^10e^-93133/RT（L/mol）^2/min.

关 键 词：磷钨酸 戊二酸二甲酯 酯化动力学 

分 类 号：TQ225.24[化学工程—有机化工] O623.624[理学—有机化学]