树脂催化合成无毒增塑剂柠檬酸三辛酯

Synthesis of non-toxic plasticizer trioctyl citrate using resin as catalyst

以树脂作催化剂,合成柠檬酸三辛酯。探讨了催化剂用量、反应温度、酸醇摩尔比和反应时间等因素对酯化反应的影响。结果表明:在150℃,酸醇摩尔比为1∶4.5,催化剂用量为柠檬酸质量的10%,反应1.5 h后,酯化率达到97%以上。催化剂的性能较好,便于与产物分离,可以回收使用。

Synthesis of trioctyl citrate using resin as the catalyst. The main factors, including quantity of the catalyst, reaction temperature, mole ratio of reactants and reaction time were investigated. The results showed that： the esterification reaction was conducted at about 150℃ in the presence of resin using about 10% by weight of citric acid, mole ratio of citric acid to 1-octanol was 1：4.5 ,the yield was up to 97% after 1.5 h. The catalyst is easily separated from product and reusable.