The solubilities of sulfolane (tetrahydrothiophene 1,1-dioxide, tetramethylene sulfone (TMS)) have been determined experimentally in six solvents, 1-heptyne, tetrahydrofuran, 1,4-dioxane, 1,1,1-trichloroethane, benzene and cyclohexane, by a dynamic method in the temperature range (250 to 301) K. The results have been correlated by the Wilson, NRTL, and UNIQUAC equations. The existence of solid−solid first-order phase transition in sulfolane has been taken into consideration in the solubility curve calculations. The average root mean square deviations of the solubility temperatures for all the measured data vary from (1.5 to 1.6) K and depend on the particular equation used.
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Domańska et al. (1996) studied this question.
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