1. Solubility, density and refractive index of formamide/N-methylformamide/N, N-dimethylformamide + rubidium bromide/cesium bromide + water ternary systems.
- Author
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Sun, Lihua, Li, Shuni, Zhai, Quanguo, Jiang, Yucheng, and Hu, Mancheng
- Subjects
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REFRACTIVE index , *TERNARY system , *SOLUBILITY , *CESIUM , *FORMAMIDE , *SOLID-liquid equilibrium - Abstract
Abstract The Solubility, density and refractive index of the formamide(FA)/ N -methylformamide(NMF)/ N , N -dimethylformamide(DMF) + rubidim bromide/cesium bromide+ water ternary systems were determined at (283.15, 298.15 and 313.15) K. The solubility of the RbBr and CsBr decrease significantly when adding amides into the aqueous solution. The variation trend of density is consistent with solubility, and the change of the refractive index is different. The isothermal experimental solubility was correlated by the NRTL model and the UNIQUAC model. The isothermal solubility, density and refractive index of the ternary systems were fitted by the four parameter equation. Moreover, the mean activity coefficients of the FA/NMF/DMF + RbBr/CsBr + H 2 O systems at experimental temperatures were obtained through the UNIQUAC model. Besides, to investigate the temperature effect on the solid-liquid equilibrium, the multiple temperatures solubility was fitted by the modified Apelbl at equation and the λh equation. Graphical abstract The phase behavior of FA/NMF/DMF (1) + RbBr/CsBr(2) + H 2 O (3) systems were investigated at 283.15, 298.15 and 313.15K. Unlabelled Image Highlights • FA/NMF/DMF + RbBr/CsBr + H 2 O ternary systems were investigated. • Solubility, density and refractive index of SLE systems were determined. • The mean activity coefficients of the systems were obtained by the UNIQUAC model. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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