The separation of non-ideal mixtures using distillation can be an extremely complex process and there continues to be a need to further improve these techniques. A new method which combines extractive heterogeneous-azeotropic distillation (EHAD) and hydrophilic pervaporation (HPV) for the separation of non-ideal ternary mixtures is demonstrated. This improved distillation method combines the benefits of heterogeneous-azeotropic and extractive distillations in one column but no added materials are needed as is usually the case with pervaporation. The separation of water-methanol-ethyl acetate and water-methanol-isopropyl acetate mixtures were investigated to demonstrate the accuracy of the combined EHAD/HPV technique. There is not currently an established treatment strategy for the separation of the second mixtures in the literature. These separation processes were rigorously modelled and optimized using a professional flowsheet. The objective functions were total cost and energy consumption and heat integration was also investigated. The verification of the process modelling was carried out using laboratory-scale measurements. Extractive heterogeneous-distillation combined with methanol dehydration was found to be more efficient than conventional distillation for the separation of these highly non-ideal mixtures.

使用蒸馏分离非理想混合物可能是非常复杂的过程，并且仍然需要进一步改进这些技术。展示了一种结合萃取非均相共沸蒸馏（EHAD）和亲水性全蒸发（HPV）分离非理想三元混合物的新方法。这种改进的蒸馏方法在一个塔中结合了非均相共沸蒸馏和萃取蒸馏的优点，但是不需要像通常的全蒸发那样添加任何材料。研究了水-甲醇-乙酸乙酯和水-甲醇-乙酸异丙酯混合物的分离，以证明结合的EHAD / HPV技术的准确性。在文献中，目前尚没有用于分离第二混合物的确定的处理策略。使用专业流程图对这些分离过程进行严格建模和优化。目标函数是总成本，能耗和热集成。使用实验室规模的测量对过程建模进行验证。发现萃取非均相蒸馏与甲醇脱水相结合比常规蒸馏更有效地分离了这些高度不理想的混合物。