Remarks and further analysis on 'Solubility and dissolution thermodynamic properties of 1,6-Bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamido]hexane in pure solvents and binary solvent mixtures'

摘要

Errors are discovered regarding the published equation coefficients of Zhang and coworkers [J. Mol. Liq. 252 (2018) 103-1111 for mathematically describing the solubility behavior of 1,6-bis[3-(3,5-di-tert-buty1-4-hydroxyphenyl)propion-amido]hexane (Irganox 1098) in neat organic solvents using the NRTL model. Larger differences are found between our back-calculated data and those reported in the authors' published paper. The expression of NRTL model was corrected and the equation parameters were re-regressed. Furthermore, the preferential solvation parameters (delta x(1,3)) of Irganox 1098 in two solvent mixtures of ethyl acetate (1) + ethhanol (2) and acetone (1) + ethanol (2) at 298.15 K were derived from their available solubility data using the inverse Kirkwood-Buff integrals method. In the ethyl acetate (1) + ethanol (2) mixture with the composition 0.40 x(1) 1, Irganox 1098 was preferentially solvated by ethanol. However in the ethyl acetate (1) + ethanol (2) mixture with the composition 0 x(1) 0.40 and the acetone (1) + ethanol (2) mixture over the whole composition range, the Irganox 1098 is preferentially solvated neither by ethyl acetate or acetone nor by ethanol. (C) 2018 Elsevier B.V. All rights reserved.