| Preparation of SO4^2-/TiO2-La2O3 solid superacid and its catalytic activities in acetalation and ketalation |
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| 作者姓名： | Yang SJ Bai AM Sun JT |
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| 作者单位： | [1]Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435002, China [2]College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20471044）, and the Natural Science Foundation of Hubei Province （No. 2005ABA053）, China |
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| 摘 要： | SO4^2- / TiO2-La2O3, a novel solid superacid, was prepared and its catalytic activities at different synthetic conditions are discussed with esterification of n-butanoic acid and n-butyl alcohol as probing reaction. The optimum conditions have also been found, mole ratio of n（La^3＋）：n（Ti^4＋） is 1：34, the soaked consistency of H2SO4 is 0.8 tool/L, the soaked time of HESO4 is 24 h, the calcining temperature is 480 ℃, the calcining time is 3 h. Then it was applied in the catalytic synthesis often important ketals and acetals as catalyst and revealed high catalytic activity. Under these conditions on which the molar ratio of aldehyde/ketone to glycol is l： 1.5, the mass ratio of the catalyst used in the reactants is 0.5%, and the reaction time is 1.0 h, the yields of ketals and acetals can reach 41.4%-95.8%.
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| 关 键 词： | SO4^2-/ TiO2-La2O3 稀土 催化剂 固体酸 制备 缩醛化 |
| 收稿时间： | 2005-11-16 |
| 修稿时间： | 2006-04-17 |
Preparation of SO
4
2?
/TiO2-La2O3 solid superacid and its catalytic activities in acetalation and ketalation |
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| Yang SJ,Bai AM,Sun JT.Preparation of SO4^2-/TiO2-La2O3 solid superacid and its catalytic activities in acetalation and ketalation[J].Journal of Zhejiang University Science,2006,7(7):553-558. |
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| Authors: | Shui-jin Yang Ai-min Bai Ju-tang Sun |
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| Institution: | (1) Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi, 435002, China;(2) College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China |
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| Abstract: | SO
4
2−
/TiO2-La2O3, a novel solid superacid, was prepared and its catalytic activities at different synthetic conditions are discussed with
esterification of n-butanoic acid and n-butyl alcohol as probing reaction. The optimum conditions have also been found, mole ratio of n(La3+):n(Ti4+) is 1:34, the soaked consistency of H2SO4 is 0.8 mol/L, the soaked time of H2SO4 is 24 h, the calcining temperature is 480 °C, the calcining time is 3 h. Then it was applied in the catalytic synthesis of
ten important ketals and acetals as catalyst and revealed high catalytic activity. Under these conditions on which the molar
ratio of aldehyde/ketone to glycol is 1:1.5, the mass ratio of the catalyst used in the reactants is 0.5%, and the reaction
time is 1.0·h, the yields of ketals and acetals can reach 41.4∼95.8%.
Project supported by the National Natural Science Foundation of China (No. 20471044), and the Natural Science Foundation of
Hubei Province (No. 2005ABA053), China |
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| Keywords: | SO4^2-/ TiO2-La2O3 Rare earth Solid superacid Catalysis |
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