Azeotropic distillation process for methanol-ethyl acetate-water separation: design and control

IF 4.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

Frontiers of Chemical Science and Engineering Pub Date : 2025-09-01 DOI:10.1007/s11705-025-2607-5

Prakhar Srivastava, Prit Dadhania, Aayush Gupta, Nitin Kaistha

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Abstract

This study proposes the synthesis, design, and control of a separation process for a concentrated ternary mixture of methanol, ethyl acetate, and water, which exhibits two minimum boiling azeotropes, to separate it into constituent nearly pure components. The proposed flowsheet leverages the presence of a liquid-liquid envelope by using a liquid-liquid extractor with recycled water as a solvent to strategically bring the initial feed point into the liquid-liquid split region, facilitating energyefficient separation. The design consists of a liquid-liquid extractor followed by a triple-column distillation sequence. Compared to the existing extractive heterogeneous azeotropic distillation process, the proposed process achieves savings of 36.9% in total annualized cost, 46.1% in reduced energy consumption, and CO₂ emission. Additionally, a regulatory plant-wide decentralized control structure has been developed through rigorous dynamic simulations, demonstrating its effectiveness in rejecting principal disturbances in throughput and feed composition.

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甲醇-乙酸乙酯-水分离共沸精馏工艺的设计与控制

本研究提出了甲醇、乙酸乙酯和水的浓缩三元混合物的合成、设计和分离过程的控制，该混合物具有两种最低沸点共沸物，将其分离成几乎纯的成分。所提出的流程利用液-液包膜的存在，使用以循环水为溶剂的液-液萃取器，策略性地将初始进料点带入液-液分离区域，促进高效分离。该设计包括一个液-液萃取器，然后是一个三柱蒸馏序列。与现有的萃取非均相共沸精馏工艺相比，该工艺年化总成本节约36.9%，能耗和CO2排放降低46.1%。此外，通过严格的动态模拟，开发了一种全厂范围的分散控制结构，证明了其在拒绝吞吐量和饲料组成中的主要干扰方面的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers of Chemical Science and Engineering ENGINEERING, CHEMICAL-

CiteScore

7.60

自引率

6.70%

发文量

868

审稿时长

1 months

期刊介绍： Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.