Abstract

CORTES-SANCHEZ, Benjamín; CRUZ-GARCIA, David  and  MEDEIROS, Milton. Correlation of water-chlorohydrocarbon mutual solubilities using a modified non-quadratic mixing rule and the Cubic-Two-State equation of state. J. Mex. Chem. Soc [online]. 2019, vol.63, n.2, pp.82-93.  Epub Apr 20, 2020. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v63i2.770.

The Cubic Two-State equation of state was employed to correlate the measured mutual solubilities of water and 23 chlorinated hydrocarbons (CHCs). Following the scheme framework laid out by Medeiros and Brindis-Flores, a nonquadratic Kabadi-Danner type mixing rule is used, where the water-water dispersive parameter is corrected due to the presence of a hydrophobic solute. The model’s three parameters were adjusted to correlate experimental binary liquid-liquid equilibrium data to relatively high accuracy. The observed minimum in CHC solubility in water near ambient conditions is reproduced reliably. Overall deviations from experimental data were 7.8% for CHC solubility in the aqueous phase and 13% for water solubility in the organic phase.

Keywords : Mutual Solubilities; Chlorinated Hydrocarbons; Liquid-Liquid Equilibrium; Equation of State.

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