摘要
研究了在实验室条件下 ,以硫酸、对甲苯磺酸为催化剂合成二甘醇二醋酸酯的方法。着重考察了原料配比、反应时间、催化剂及其用量等因素对反应的影响。结果表明 ,硫酸对反应具有较高的催化活性。当n(醋酸 )∶n(二甘醇 ) =2 .4∶1,反应时间为 4 .5h ,催化剂硫酸的加入量为二甘醇质量(W )的 1.5 % ,反应温度不高于 2 0 0℃时 ,其酯含量为 99.7% ,产率为 80 .2 %。
Diglycol diacetate had been obtained with sulfuric acid or toluene-p-sulfonic acid as catalyst in lab. The effects of material proporation, reaction time, catalyst and its use level were studied. Sulfuric acid has high catalyst property. The optimal conditions were as follows: molar ratio of acetic acid to diglycol was 2.4∶1, reaction time was 4.5h, the use level of catalyst was 1.5%(compared to diglycol), reation temperature was below 200℃. The end product has 99.7% diglycol diacetate and yield was 80.2%.
出处
《辽宁化工》
CAS
2002年第3期93-96,共4页
Liaoning Chemical Industry
