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制备团体酸ＴｉＯ_２－ＳｉＯ_２－Ｅｒ／ＳＯ~(２－)_４催化剂．用于柠檬酸三丁酯合成反应．用正交实验 的方法研究了反应因素对柠檬酸三丁酯酯化率的影响．借助ＸＲＤ．ＩＲ，ＢＥＴ的表征手段研 究催化剂及合成反应．实验结果表明， ＳｉＯ２和 Ｅｒ的加入．能提高催化剂的活性．
Preparation of group acid TiO_2-SiO_2-Er / SO ~ (2 -) _4 catalyst. For the synthesis of tributyl citrate reaction. The effect of reaction factors on the esterification rate of tributyl citrate was studied by orthogonal experiment. With XRD. IR, BET characterization means to study the catalyst and the synthesis reaction. The experimental results show that the addition of SiO2 and Er. Can improve the activity of the catalyst.