Abstract: Diethylene glycol dibenzoate was synthesized by the reaction of benzoic acid (BA) with diethylene glycol (DEG) using Ti(OBu)4/AC as catalyst. The optimal reaction condition was found as：the molar ratio of benzoic acid to diethylene glycol was 2∶1，the mass ratio of catalyst to benzoic acid was 1.25%，the mass ratio of butyl ether to benzoic acid was 20%，reaction temperature was 200℃，and reaction time was 7h. The optimal esterification rate was up to 98.1%. After three times of repeated use，the esterification yield still maintained above 97%. The apparent kinetics model of esterification was established，and the equation of reaction rate was：rA=6. 28× 109exp CACB.

Key words: tetrabutyl titanate, supported catalyst, active carbon, diethylene glycol dibenzoate

摘要： 以活性炭负载钛酸四丁酯[Ti(OBu)4/AC]为催化剂，用于催化合成二甘醇二苯甲酸酯（DEDB）。通过实验确定了合成DEDB的适宜工艺条件：n(BA)∶n(DEG) = 2∶1、催化剂用量为1.25%，带水剂用量为20.0%，反应温度为200℃，反应时间为7h，该反应条件下酯化率可达98.1%。催化重复使用实验表明该催化剂具有良好的稳定性。同时建立了该酯化合成的表观动力学模型，得到反应速率方程为：rA=6.28× 109exp CACB。

关键词: 钛酸四丁酯, 固载催化剂, 活性炭, 二甘醇二苯甲酸酯