Hadj-Kali Mohamed K, Salleh M Zulhaziman M, Wazeer Irfan, Alhadid Ahmad, Mulyono Sarwono
Chemical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia.
Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia.
Molecules. 2022 Jun 23;27(13):4041. doi: 10.3390/molecules27134041.
The separation of benzene and cyclohexane is a challenging process in the petrochemical industry, mainly because of their close boiling points. Extractive separation of the benzene-cyclohexane mixture has been shown to be feasible, but it is important to find solvents with good extractive performance. In this work, 23 eutectic solvents (ESs) containing aromatic components were screened using the predictive COSMO-RS and their respective performance was compared with other solvents. The screening results were validated with experimental work in which the liquid-liquid equilibria of the three preselected ESs were studied with benzene and cyclohexane at 298.5 K and 101.325 kPa, with benzene concentrations in the feed ranging from 10 to 60 wt%. The performance of the ESs studied was compared with organic solvents, ionic liquids, and other ESs reported in the literature. This work demonstrates the potential for improved extractive separation of the benzene-cyclohexane mixture by using ESs with aromatic moieties.
苯和环己烷的分离在石油化工行业中是一个具有挑战性的过程，主要是因为它们的沸点相近。苯 - 环己烷混合物的萃取分离已被证明是可行的，但找到具有良好萃取性能的溶剂很重要。在这项工作中，使用预测性的COSMO - RS筛选了23种含有芳香族成分的低共熔溶剂（ESs），并将它们各自的性能与其他溶剂进行了比较。筛选结果通过实验工作进行了验证，在实验中研究了三种预选的ESs在298.5 K和101.325 kPa下与苯和环己烷的液 - 液平衡，进料中苯的浓度范围为10至60 wt%。将所研究的ESs的性能与文献中报道的有机溶剂、离子液体和其他ESs进行了比较。这项工作证明了使用具有芳香基团的ESs改善苯 - 环己烷混合物萃取分离的潜力。
