间歇共沸精馏分离乙二醇单甲醚-水物系  

Separation of 2-methoxyethanol-water mixture by batch azeotropic distillation

作　　者：李春利[1] 张明禄[1] 方静[1] 胡雨奇[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《化工进展》2012年第6期1220-1223,1243,共5页Chemical Industry and Engineering Progress

摘　　要：通过绘制乙二醇单甲醚-水-共沸剂的简捷剩余曲线,提出了以乙酸异丙酯作为间歇共沸精馏法分离乙二醇单甲醚-水物系的共沸剂。然后完成剩余曲线数据的测定实验,根据实验数据绘制乙二醇单甲醚-水-乙酸异丙酯三元物系的剩余曲线图,确定了乙二醇单甲醚-水共沸物系的分离工艺。并通过实验研究了共沸剂加入量对乙二醇单甲醚回收率的影响,从而确定了适宜的共沸剂配比:当共沸剂与原料中水的质量比为2～2.5时,乙二醇单甲醚的一次性收率在90%以上。According to the short-cut residue curves for the ternary system of 2-methoxyethanol-waterentrainers, isopropyl acetate was chosen as an entrainer for the separation of 2-methoxyethanol-water mixture by batch azeotropic distillation.Then the residue curve determination experiment was completed and the residue curves for the ternary system of 2-methoxyethanol-water-isopropyl acetate were plotted based on the experiment data.A batch azeotropic distillation process was proposed for the separation of 2-methoxyethanol-water mixture.The effect of the amount of entrainer on the yield of 2-methoxyethanol was studied and the proper ratio of entrainer to feed was obtained.When w（isopropyl acetate）︰w（water）=2～2.5,especially,one-time yield of 2-methoxyethanol was more than 90%.

关 键 词：乙二醇单甲醚 共沸精馏 乙酸异丙酯 间歇精馏 

分 类 号：TQ028.13[化学工程]