乙二醇独乙醚-甲基异丁基酮-水三元非均相共沸物系分离过程

Azeotropic distillation process of ternary heterogeneous azeotropic mixture of 2-ethoxy-ethanol-4-methyl-2-pentanone-water

通过塔釜剩余曲线图、蒸馏边界线、液-液相平衡线等曲线,对乙二醇独乙醚-甲基异丁基酮-水三元非均相共沸物系进行理论分析,确定该物系分离需要共沸精馏、冷凝分相、油相部分回流、重组分回收、轻组分回收等5步工艺。通过流程设计、模拟计算、实验验证等研究,得到质量分数为99.24%甲基异丁基酮,质量分数为99.17%的乙二醇独乙醚和质量分数为98.52%的水。实验结果与模拟结果高度吻合,确定此分离工艺具有良好的工业前景。

The ternary heterogeneous azeotropic mixture of 2-ethoxy-ethanol,4-methyl-2-pentanone and water was theoretically studied by the residue curve maps（RCM）,the residue curve,the distillation boundary and the liquid-liquid equilibrium curve.Through process design,simulating and experimental validation,the separation process was set up.Five steps that were used to get 4-methyl-2-pentanone with mass fraction of 99.24%,2-ethoxy-ethanol with mass fraction of 99.17%,and water with mass fraction of 98.52% were designed,including azeotropic distillation,phase condensed,partial reflux of oil phase,recovery of heavy components,recovery of light components.The experimental results are highly coinciding with the simulation results,which can ensure good industrial prospects of the separation process.