Extractive rectification using DES for benzene-cyclohexane-cyclohexene ternary azeotropic system

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-12-10 DOI:10.1002/jctb.7774

Wang Haiou, Xu Yang, Sang Weihe, Li Hao, Fang Jing

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引用次数: 0

Abstract

BACKGROUND

Benzene, cyclohexane, and cyclohexene are ternary azeotropic systems, which cannot achieve high-purity separation by ordinary distillation, but this issue can be solved by extractive distillation. Deep Eutectic Solvents (DES) is a ‘green solvent’ that has emerged in recent years and is often used as an extractant.

RESULTS

In this study, the COSMO-SAC solvation model was used to calculate the infinite dilution activity coefficients (γ∞) of DES with different compositions to screen suitable DES, and the effect was demonstrated by vapor–liquid equilibrium experiment (VLE). In addition, the effect of intermolecular interactions was explored in this study by means of independent gradient (IGM) equivalence plot, and process simulations were carried out by means of Aspen Plus software.

CONCLUSION

VLE experiments showed that the combination of DES extractants tetrabutylphosphonium bromide: levulinic acid (1:4) and tetrabutylammonium bromide: cyclobutyl sulfone (1:4) could break the azeotropic relationship of benzene, cyclohexane, and cyclohexene ternary systems. In addition, using Aspen process simulation to compare the screened DES extractant with the industrially used dimethylacetamide (DMAC) extractant, the use of the screened DES extractant was able to reduce the condenser and reboiler energy consumption by 14.93%. © 2024 Society of Chemical Industry (SCI).

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用DES萃取精馏苯-环己烷-环己烷三元共沸体系

苯、环己烷和环己烯为三元共沸体系，普通精馏无法实现高纯度分离，而萃取精馏可以解决这一问题。深共晶溶剂（DES）是近年来兴起的一种“绿色溶剂”，常被用作萃取剂。结果本研究采用cosmos - sac溶剂化模型计算了不同成分的DES的无限稀释活度系数（γ∞），筛选了合适的DES，并通过气液平衡实验（VLE）验证了效果。此外，利用独立梯度（IGM）等效图探讨了分子间相互作用的影响，并利用Aspen Plus软件进行了过程模拟。结论VLE实验表明，四丁基溴化磷：乙酰丙酸（1:4）和四丁基溴化铵：环丁基砜（1:4）的萃取剂组合可以破坏苯、环己烷和环己烯三元体系的共沸关系。此外，通过Aspen过程模拟将筛选的DES萃取剂与工业上使用的二甲基乙酰胺（DMAC）萃取剂进行了比较，结果表明，使用筛选的DES萃取剂可使冷凝器和再沸器能耗降低14.93%。©2024化学工业学会（SCI）。

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

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.