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

摘要

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 + H2O). 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.%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.