| Sol-Gel负载磷钨酸催化合成乙二醇单乙醚醋酸酯 |
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| 引用本文： | 苏秋芳,刘宝生,黄军左,陈小平.Sol-Gel负载磷钨酸催化合成乙二醇单乙醚醋酸酯[J].精细化工中间体,2005,35(5):55-57. |
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| 作者姓名： | 苏秋芳 刘宝生 黄军左 陈小平 |
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| 作者单位： | 茂名学院,广东,茂名,525000;茂名学院,广东,茂名,525000;茂名学院,广东,茂名,525000;茂名学院,广东,茂名,525000 |
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| 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。
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| 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 |
| 文章编号： | 1009-9212(2005)05-0055-03 |
| 收稿时间： | 2005-05-28 |
| 修稿时间： | 2005年5月28日 |
Synthesis. of Ethylene Glycol Monoether Acetate Catalyzed by Phosphotungstic Acid Immobilized on Sol-Gel |
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| SU Qiu-fang,LIU Bao-sheng,Huang Jun-zuo,CHEN Xiao-ping.Synthesis. of Ethylene Glycol Monoether Acetate Catalyzed by Phosphotungstic Acid Immobilized on Sol-Gel[J].Fine Chemical Intermediates,2005,35(5):55-57. |
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| Authors: | SU Qiu-fang LIU Bao-sheng Huang Jun-zuo CHEN Xiao-ping |
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| Affiliation: | Maoming college, Maoming 525000, China |
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| 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 time 60min. Under above conditions; the yield reached over 96%. The catalyst of phosphotungstic acid supported on SiO2 directly was studied else. |
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| Keywords: | Sol-Geh ethylene glycol monoether acetate phosphotungstic acid esterification |
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