Document Type
Article (Restricted)
Publication Date
5-1-2015
Abstract
(Liquid + liquid) extraction of ethylbenzene from n-octane by using tetrabutylammonium bromide-based deep eutectic solvents (DESs) containing pyridine, ethylene glycol, or a mixture of both complexing agents was investigated at 25 degrees C and atmospheric pressure. The performance of each DES was determined from the distribution ratio and selectivity values calculated using experimental (liquid + liquid) equilibrium data of the ternary systems ethylbenzene + n-octane + DESs. The DES with only ethylene glycol had a high selectivity but a low distribution ratio, whereas the DES with only pyridine had a high distribution ratio but a low selectivity. For the other DESs, adding pyridine increased the distribution ratio, and increasing the molar ratio of ethylene glycol increased the selectivity. Generally, whenever the selectivity increased, the distribution ratio decreased, and vice versa. The nonrandom two-liquid model was used to correlate the experimental data, and the average root mean square deviation (RMSD) between correlated and experimental tie lines was 1.4. Moreover, the Conductor-like Screening Model for Real Solvents was successfully used to predict the ternary tie lines for the studied systems with an average RMSD of 3.7. (C) 2015 Elsevier Ltd. All rights reserved.
Keywords
Deep eutectic solvent, (Liquid + liquid) extraction, Aromatic/aliphatic separation, COSMO-RS prediction, NRTL modeling
Divisions
fac_eng
Funders
University of Malaya Centre for Ionic Liquids (UMCiL) through the HIR Grant HIR-MOHE (D000003-16001),Deanship of Scientific Research at King Saud University RGP-VPP-108
Publication Title
The Journal of Chemical Thermodynamics
Volume
84
Publisher
Elsevier
Additional Information
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