离子液体与树脂催化合成醋酸正丁酯的动力学比较  

Kinetic comparison for esterification reaction of n-butyl acetate catalyzed by ionic liquids and resin

作　　者：张涛俊[1] 陶端健[1] 周政[1] 吴有庭[1] 张志炳[1] 

机构地区：[1]南京大学化学化工学院,江苏南京210093

出　　处：《化学工程》2009年第12期32-34,54,共4页Chemical Engineering(China)

摘　　要：以阳离子交换树脂AMBERLYST15和各种离子液体为催化剂,研究了醋酸和正丁醇反应生成醋酸正丁酯的动力学。实验测定了催化剂种类、反应温度和催化剂量对反应速率的影响,并用拟均相模型对实验数据拟合。在实验条件下,发现AMBERLYST15和己内酰胺四氟硼酸盐催化效率很高,表观活化能分别为36.69,37.06kJ/g,指前因子分别为120.0,61.50m3/(g.h)。结果表明,树脂AMBERLYST15和己内酰胺四氟硼酸盐离子液体二类催化反应的活化能相近,指前因子却相差很大,2种催化剂在相同的催化机理下有不同的催化效率。Using the cation-exchange resin the esterification reaction with acetic acid AMBERLYST 15 and various ionic and n-butanol to synthesize n-butyl liquids as catalysts, the kinetics for acetate was investigated. The effects of catalyst types, reaction temperature and catalyst loading amount on the kinetics were examined, and the kinetic data were evaluated by using a pseudo-homogeneous （P-H） kinetic model. The results show that AMBERLYST 15 and caprolactam tetrafluoroborate are the most effective catalysts for the synthesis of n-butyl acetate under the experimental conditions, and the apparent activation energy of which is 36.69, 37.06 kJ/g, respectively, whereas their pre-exponential factor of reaction rate constant is 120.0, 61.50 m3/（ g · h）, implying a big difference. Two catalysts have different catalytic efficiency in the same catalysis mechanism.

关 键 词：动力学 催化反应精馏 阳离子交换树脂 离子液体 醋酸正丁酯 

分 类 号：TQ225.241[化学工程—有机化工]