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。
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.
出处
《精细化工中间体》
CAS
2005年第5期55-57,共3页
Fine Chemical Intermediates
