乙二醇独乙醚-甲基异丁基酮-水三元非均相共沸物系分离研究  

Separation of ternary heterogeneous azeotropic mixture of 2-ethoxy-ethanol,4-methyl-2-pentanone and water

作　　者：彭娟[1] 潘军[2] 徐姣[1] 张卫江[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]天津市联合环保工程设计有限公司,天津300191

出　　处：《化学工程》2011年第8期1-5,共5页Chemical Engineering(China)

摘　　要：实验考察了液液萃取法、加盐分相法、共沸精馏法对乙二醇独乙醚-甲基异丁基酮-水(EC+MIBK+H2O)三元非均相共沸物系的分离效果。结果表明:以苯、甲苯、环己烷为萃取剂的液液萃取法分离效果较差;以K2CO3晶体为加盐相的加盐分相法,虽然可以取得较好的分离效果,但是不利于工业化生产;以甲基异丁基酮为夹带剂的间歇式共沸精馏法可以得到质量分数为99.4%的乙二醇独乙醚和99.2%的甲基异丁基酮并具有较好的工业化前景。Liquid-liquid extraction, phase separation with salt, azeotropic distillation were investigated for the separation of ternary heterogeneous azeotropic mixture of 2-ethoxy-ethanol, 4-methyl-2-pentanone and water （ EC ＋ MIBK ＋ H2 O）. The result shows that the results of liquid-liquid extraction were not effective ; phase separation with K2CO3 as isolates has good result but a large number of salt recovery make this method too difficult to be industrialized; azeotropic distillation with methyl isobutyl ketone as entrainer can get EC with mass fraction of 99.4% and MIBK with mass fraction of 99.2%, and has perfect future for industrialization.

关 键 词：非均相共沸物 液液萃取法 共沸精馏 加盐分相法 

分 类 号：TQ202[化学工程—有机化工]