| 第 35 卷第 5 期 |  | Vol. 35 No. 5 | | 2005 年 10 月 | Oct 2005 |
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所属栏目：其它
Sol-Gel负载磷钨酸催化合成乙二醇单乙醚醋酸酯 |
| 苏秋芳; 刘宝生; 黄军左; 陈小平(茂名学院; 广东茂名) |
| 摘 要：以醋酸和乙二醇单乙醚为原料,硅酸乙酯为硅源,通过溶胶-凝胶法(Sol-Gel)负载磷 钨酸为催化剂,合成了乙二醇单乙醚醋酸酯。实验结果表明:当正硅酸乙酯:水(mol／mol)=1∶4, 正硅酸乙酯:磷钨酸(W/W)=10∶1,醋酸:醇醚(mol／mol)=1．4∶1,催化剂用量为醇醚质量的 10％,带水剂甲苯用量为反应物质量的15％,反应时间为60 min时,收率可达96％以上。比较了 以硅胶直接负载磷钨酸作为催化剂的使用情况。 |
| 关键词：乙二醇单乙醚醋酸酯; 硅胶; 磷钨酸; 硅酸乙酯; 溶胶-凝胶法 |
| 中图分类号：TQ223.2 文献标识码：A 文章编号：1009-9212(2005)05-0055-03 |
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| Synthesis of Ethylene Glycol Monoether Acetate Catalyzed by Phosphotungstic Acid Immobilized on Sol-Gel |
| SU Qiu-fang; LIU Bao-sheng; Huang Jun-zuo CHEN Xiao-ping Maoming college; Maoming 525000; China |
| Abstract：Ethylene glycol monoether acetate was synthesized from acetic acid and ethylene glycol mono-ethyl ether with phosphotungstic acid immobilized on Sol-Gel catalyst. The proper conditions for esterification were as following: molar ratio of ethyl silicate to water was 1:4, mass ratio of phosphotungstic acid to ethyl silicate 10:1, molar ratio of acetic acid to ethylene glycol monoethyl ether 1.4:1,the catalyst amount about 10% of the mass of alcohol ether, toluene about 15% of the mass of reactants; reaction t... |
| Key words：Sol-Gel; ethylene glycol monoether acetate; phosphotungstic acid; esterification |
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收稿日期：2005-05-28
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