Experimental investigation and modeling of thermophysical and extraction properties of choline chloride plus DL-malic acid based deep eutectic solvent
AuthorsVuksanovic, Jelena M.
Serbanovic, Slobodan P.
Radovic, Ivona R.
Article (Published version)
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The ability of non-toxic and biodegradable deep eutectic solvent (DES) choline chloride + DL-malic acid in mole ratio 1: 1, for the breaking of the azeotropes heptane + methanol and toluene + methanol by means of liquid-liquid extraction was evaluated. Ternary liquid-liquid equilibrium experiments were performed at 298.15 K and at atmospheric pressure. Densities, viscosities and refractive indices of DES + methanol and water + DES systems were experimentally determined over a wide temperature range and at atmospheric pressure. Additionally, the viscosities of DES + glycerol mixture were determined at temperatures up to 363.15 K to check how much the addition of glycerol decreases high viscosities of DES. The results indicate that the addition of small amounts of water or glycerol as a third component significantly decreases the viscosity of the investigated deep eutectic solvent. Based on the selectivity and distribution ratio values, the extraction ability of the investigated deep eut...ectic solvent, in comparison with the conventionally used solvents, yields promising results. Non-random two-liquid (NRTL) and universal quasichemical (UNIQUAC) models were satisfactorily applied for correlation of experimental phase equilibrium data for two ternary mixtures.
Keywords:deep eutectic solvents / choline chloride / DL-malic acid / quantitative C-13-NMR spectroscopy / liquid-liquid equilibria / modelling
Source:Journal of the Serbian Chemical Society, 2017, 82, 11, 1287-1302
- Serbian Chemical Society
- Research Fund of Ministry of Education, Science and Technological Development, Serbia
- New industrial and environmental application of chemical thermodynamics to the development of the chemical processes with multiphase and multicomponent systems (RS-172063)