一水合硫酸氢钠催化合成柠檬酸三丁酯

Synthesis of Tributyl Citrate by Using Sodium Bisulfate Monohydrate as Catalyst

以一水合硫酸氢钠作为催化剂合成柠檬酸三丁酯,其优化工艺条件为催化剂用量为总加料量的4.0%～4.5%,柠檬酸与正丁醇加料比为1∶4.5～5.0,反应终点温度145～150℃。所得产品可达到国家优级品标准,酯化率达99%以上;催化剂价廉易得,可重复使用4次,再生容易,无腐蚀。

The synthesis of the tributyl citrate are catalyzed by sodium bisulfate monohydrate.The optimum process conditions are showed as follows:amounts of catalyst in the range4.0%～4.5%,which is expressed by the mass fraction of total weight of reagents,citric acid/n-butanol is1∶(4.5～5.0).The terminal reaction tempera ture is145～150℃,products achieve the domestic standard of high quality,the ratio of esterization is above99%.The catalyst is very inexpensive and easy found.It can be reused four times,easy regenerated,no corrosion and low pollution.