新复合催化剂催化合成增塑剂柠檬酸三丁酯

Catalytic Synthesis of Plasticizer Tributyl Citrate by New Composite Catalyst

在新复合催化剂催化作用下,以柠檬酸和正丁醇为原料,合成了无毒增塑剂柠檬酸三丁酯。结果表明:柠檬酸三丁酯的最佳新催化合成工艺条件为:柠檬酸为0.3 mol,催化剂用量为TBC质量2.5%,n_(柠檬酸)∶n_(正丁醇)=1∶4.5,反应时间1.5 h。在上述条件下,产品收率为98.48%,产品经气相色谱分析纯度大于99.0%;在最佳工艺条件下进行5.0 L放大投料实验结果表明,采用自制的复合催化剂在最佳实验条件下进行催化合成TBC实验结果好于小试结果。

Non-toxic plasticizer tributyl citrate was synthesized from citric acid and n-butanol in the presence of a new composite catalyst. Experiment results indicated that the optimum process conditions were as follows ： molar ratio of citric acid to n-butanol 1 ：4. 5, the amount of catalyst 2. 5% of citric acid in mass, reaction time 1.5 h. Under the above conditions, the yield of the product was 98.48%, gas chromatography purity more than 99%. The results of a 5.0 L pilot scale experiment were better than that of a bench scale experiment in the optimum conditions.