【摘要】 在固体超强酸S2O28-/SnO2-SiO2的催化下,以柠檬酸和正丁醇为原料,合成了标题化合物。实验结果表明,固体酸S2O82-/SnO2-SiO2催化合成柠檬酸三丁酯的最佳工艺条件为:催化剂用量占柠檬酸质量的2%,n(柠檬酸)∶n(正丁醇)=1∶4,回流温度120℃,反应时间4 h,酯化率96.2%,催化剂经重复使用5次,活性未见明显降低。产品经红外光谱、核磁进行定性分析,纯度经气相色谱分析>99.0%。更多还原

【Abstract】 A non-toxic plasticizer tributyl citrate was synthesized by the reaction of citric acid with n-butanol using solid superacid S2O2-8/SnO2-SiO2 as the catalyst.Experiment results indicated that the optimum process conditions were as follows.The mole ratio of citric acid to n-butanol was 1∶4.The amount of catalyst was 2 percent of the mass of citric acid.The refluxing temperature was 120 ℃ and the reaction time was 4 h,with the esterification yield reaching up to 96.2%.The catalyst after having been used for 5 times,didn′t show significant decline in its activity.The qualitative analysis of product was carried out by using IR and NMR spectroscopy.The purity of product analyzed by GC was above 99.0%.更多还原