Separation of Benzene and Cyclohexane Using Eutectic Solvents with Aromatic Structure

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 performanc...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2022-06, Vol.27 (13), p.4041
Main Authors: Hadj-Kali, Mohamed K., Salleh, M. Zulhaziman M., Wazeer, Irfan, Alhadid, Ahmad, Mulyono, Sarwono
Format: Article
Language:English
Subjects:
Benzene
Boiling points
COSMO-RS
Cyclohexane
Efficiency
eutectic solvents
Hydrocarbons
Ionic liquids
Liquid-liquid equilibrium
LLE
Mixtures
Organic solvents
Petrochemicals
Petrochemicals industry
Separation
Solvents
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Summary: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.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules27134041