乙酸正丁酯合成中无机盐催化作用的研究

Study on the catalytic behavior of inorganic salt in synthesis of n-butyl acetalc

考察了CuSO4·5H2 O、FeSO4· 7H2 O、ZnSO4·7H2 O、CuCl2 ·2H2 O、FeCl3·6H2 O五种无机盐作乙酸与正丁醇酯化反应的催化剂的催化性能 ,结果表明FeCl3·6H2 O是较好的催化剂。同时 ,研究了以FeCl3·6H2 O为催化剂合成乙酸正丁酯的最佳反应条件 ,通过正交实验 ,选定的优化条件为 :催化剂用量为反应物总质量的 3% ,回流分水时间 2h ,酸醇摩尔比 :1 1 2 ,反应温度为回流温度。在最佳条件下 ,酯转化率达 98 98%。

The catalytic behaviors of CuSO 4·5H 2O,FeSO 4·7H 2O,ZnSO 4·7H 2O,CuCl 2·2H 2O and FeCl 3·6H 2O in esterification of n-butyl alcohol with acetic acid are studied.Results show that FeCl 3·6H 2O are better catalysts.The optimal conditions for synthesizing n-butyl acetate catalyzed by ferric chloride are determined.Through orthogonal experiments,the optimum coditions are selected following:the weight of catalyst is 3% of total reaction mass,the molar ratio of acid with alcohol was 1:1 2,and the reaction time was 2h. The esterfication rate is 98 98% under this condition.