https://doi.org/10.15255/KUI.2018.004
Published: Kem. Ind. 67 (9-10) (2018) 385–402
Paper reference number: KUI-04/2018
Paper type: Original scientific paper
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Modelling of Liquid–liquid Equilibria in Quasi-seven-component Systems with Deep Eutectic Solvents as Extraction Media

M. Rogošić and K. Zagajski Kučan

Abstract

Liquid-liquid equilibria were experimentally investigated in systems in which the first component was aliphatic (n-hexane, n-heptane or i-octane) or aromatic hydrocarbon (toluene), the second component was pyridine or thiophene, and the third quasi-component was DES consisting of choline chloride and glycerol or choline chloride and ethylene glycol, at 25 °C and atmospheric pressure. The equilibria were successfully described by the NRTL and UNIQUAC models. The same models were successfully applied to describe the liquid-liquid equilibria in quasi-seven-component systems that comprised all the mentioned low molecular weight components and one DES. The restrictions of the models were discussed; it seems that the preference can be given to the UNIQUAC model.

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Keywords

natural deep eutectic solvents, NRTL, UNIQUAC, model fuel, liquid-liquid equilibria