| SO4^2--La2O3-TiO2固体超强酸催化水杨酸的酯化反应 |
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| 引用本文： | 张霞. SO4^2--La2O3-TiO2固体超强酸催化水杨酸的酯化反应[J]. 安庆师范学院学报(自然科学版), 2012, 18(2): 84-86 |
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| 作者姓名： | 张霞 |
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| 作者单位： | 安庆师范学院化学化工学院,安徽安庆,246011 |
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| 基金项目： | 国家自然科学基金(20572001);安徽省教育厅重点基金(2004kj164zd)资助 |
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| 摘 要： | 首次以SO42--La2O3-TiO2为非均相催化剂,以水杨酸为原料,合成了水杨酸甲酯和乙酰水杨酸。考察了影响反应的条件,获得优化实验条件:n水杨酸:n甲醇为1:12,催化剂用量40 g/mol酸,反应5 h时,水杨酸甲酯的收率可达86%;n水杨酸:n乙酸酐为1:4,催化剂用量6 g/mol酸时,乙酰水杨酸的收率可达87%,同时催化剂回收再生容易,重复使用4次催化活性无明显降低,是一种环境友好的催化剂。
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| 关 键 词： | 固体超强酸SO4^2--La2O3-TiO2 催化 水杨酸 酯化 |
The Esterification of Salicylic Acid Catalyzed by Solid Super Acid SO42-4-La2O3-TiO2 |
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| ZHANG Xia. The Esterification of Salicylic Acid Catalyzed by Solid Super Acid SO42-4-La2O3-TiO2[J]. Journal of Anqing Teachers College(Natural Science Edition), 2012, 18(2): 84-86 |
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| Authors: | ZHANG Xia |
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| Affiliation: | ZHANG Xia(School of Chemistry and Chemical Engineering,Anqing Teacher College,Anqing 246011,Chian) |
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| Abstract: | Solid super acid SO2-4-La2O3-TiO2 is first applied to esterification of Salicylic Acid with methyl alcohol and acetic anbyolride.Reaction conditions are studied.The optimum condition is in the following:molar ratio of Salicylic Acid to methyl alcohol being 1:12,the quantity of catalyst being 40g/mol acid,and the reaction time being 5h,the yield of Methyl Salicylate reaching over 86%;molar ratio of Salicylic Acid to acetic anbyolride being 1:4,the quantity of catalyst being 6g/mol acid,the yield of Aacetyl Salicylic Acid could reaching over 86%.The catalyst could be easily re-cycled at least four times without the obvious loss of catalytic activity.It is an envionmentally friendly catalyst. |
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| Keywords: | solid super acid SO2-4-La2O3-TiO2 catalyze salicylic Acid esterification |
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