CAJ | 학술논문

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 102.80 RT-CACB。
이활성탄부재태산사정지[Ti(OBu)4/AC]위최화제，용우최화합성이감순이분갑산지（DEDB）。통과실험학정료합성DEDB적괄의공예조건：n(BA)∶n(DEG)=2∶1、최화제용량위1.25%，대수제용량위20.0%，반응온도위200℃，반응시간위7h，해반응조건하지화솔가체98.1%。최화중복사용실험표명해최화제구유량호적은정성。동시건립료해지화합성적표관동역학모형，득도반응속솔방정위：rA=6.28×109exp 102.80 RT-CACB。
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 102.80 RT-CACB.