SO_4^(2-)/TiO_2/La^(3+)型固体超强酸催化合成柠檬酸三丁酯

Synthesis of Tributyl Citrate Catalyzed by Solid Superacid SO_4~2/TiO_2/La^(3+)

研究了以柠檬酸和正丁醇为原料、固体超强酸SO42-/TiO2/La3+为催化剂合成增塑剂柠檬酸三丁酯。合成柠檬酸三丁酯的最佳条件为:醇酸物质的量比为1∶3.6,催化剂固体超强酸SO42-/TiO2/La3+用量为0.6%(质量分数),适宜的反应时间为2.0h,酯化反应收率达93.1%。

Tributyl citrate was synthesized from citric acid and n-butanol using solid superacid SO4^2/TiO2/ La^3＋ as catalyst. The results show that the optimum conditions of esterification are as follows： the molar ratio of n-butanol to citric acid was 3.6, usage of catalyst was 0.6%（wt%）, reaction time was 2.0h. And the esterification yeild was 93.1%.