关键词: 乙二醇单甲醚, 共沸精馏, 乙酸异丙酯, 间歇精馏

Abstract: According to the short-cut residue curves for the ternary system of 2-methoxyethanol-water- entrainers，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%.

Key words: 2-methoxyethanol, azeotropic distillation, isopropyl acetate, batch distillation