This article develops a four-column hybrid process of hetero-azeotropic distillation and pressure-swing distillation (HAD-PSD) for separating a ternary multi-azeotropic mixture i.e., an organic aqueous solution with a low concentration of isopropanol (IPA) and diisopropylether (DIPE). For improving its economic and energetic performances, an intensified process by heat pump and dividing wall column is proposed, namely HAD-DWC-VRC-PSD. The quantified performance improvement over the HAD-PSD process reveals that the annual energy cost is drastically reduced by 39.7 % from 45.5–27.4 $ per tonne of IPA and DIPE while the total annual cost is cut by 11.7 % from 92.0–81.3 $ per tonne of IPA and DIPE. Besides, the thermodynamic efficiency is increased from 19.80 % to 25.96 %, and the carbon footprint as an indicator of unsustainable energy use is abated by 59 %. Overall, the HAD-DWC-VRC-PSD process is economically viable and eco-sustainable in a way.

本文开发了一种四塔杂化共沸蒸馏和变压蒸馏（HAD-PSD）的混合工艺，用于分离三元多共沸混合物，即低浓度异丙醇（IPA）和二异丙醚的有机水溶液（ DIPE）。为了提高其经济性和能量性能，提出了通过热泵和隔墙柱强化工艺，即HAD-DWC-VRC-PSD。通过对HAD-PSD过程进行量化的性能改进，可以发现IPA和DIPE的年能源成本从每吨45.5-27.4美元大幅降低了39.7％，而总年成本则从每吨92.0-81.3美元降低了11.7％。 IPA和DIPE。此外，热力学效率从19.80％提高到25.96％，碳足迹作为不可持续能源使用的指标减少了59％。总体而言，HAD-DWC-VRC-PSD流程在某种程度上在经济上可行且生态可持续。