Correlations for the solubility of normal alkanoic acids ando-toluic acid in binary solvent mixtures |
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Authors: | Urszula Domańska Tadeusz Hofman |
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Affiliation: | (1) Department of Physical Chemistry, Technical University of Warsaw, Noakowskiego 3, 00664 Warsaw, Poland |
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Abstract: | Reasonable estimates of ternary solid-liquid equilibrium can be obtained by application of the Wilson and UNIFAC models. The solubilities of octadecanoic, eicosanoic, docosanoic, and o-toluic acids in binary solvents consisting of a common component (cyclohexane) and a varying second component (heptane, ethanol, methanol, 2-propanol, and 1-butanol) have been measured by a dynamic method from 290 to 340 K. The systems containing cyclohexane-alcohols mixed solvents were found to exhibit a synergistic effect of solubility. The best prediction was obtained for the Wilson equation utilizing temperature dependent ij parameters. For solubilities in nonpolar solvents, the standard deviations for predicted solubilities are comparable to the experimental errors.Presentation to First International Symposium on Solubility Phenomena, University of Western Ontario, London, Ontario, August 21–23, 1984. |
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Keywords: | Solids solubility prediction UNIFAC Wilson equation synergistic effect monocarboxylic acids |
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