Measurement and Correlation of Liquid-Liquid Equilibria for Ternary Systems of Water + rubidium Chloride + propanol

Abstract

Liquid-liquid equilibria for ternary systems of water þ rubidium chloride þ 1-propanol and water þ rubidium chloride þ 2-propanol were measured at T ¼ 298.15, 308.15, and 318.15 K. The experimental data were correlated using Othmer-Tobias and Bancroft correlations. The salting-out effect of 1-propanol in the two-liquid region was greater than that for 2-propanol, but the effect of temperature on the equilibrium was not significant.

Liquid–Liquid Equilibrium for the Ternary System Water + 1-Methylimidazole + Ionic Liquid ([Hmim][PF6], [Omim][PF6], or [Omim][BF4]) at 303.15 K

“…Both anions and cations of ILs had a particular impact on the immiscible region. For anions, the hydrophobicity of [BF 4 ] was less than , reported in our previous article 9 are also listed in Figures 2 and 3.…”

“…Recently, we reported that the extraction process of 1methylimidazole from aqueous solution using IL, namely, [Bmim][PF 6 ], has been proved to be feasible. 9 mentioned that the length of the carbon chain of cations and the types of anions in imidazole ILs have apparent effects on the separation efficiency. ] were also measured by the researchers.…”

“…This study provides a theoretical foundation for designing the extraction process of the 1-methylimidazole solution by ILs. 9 Briefly, the measurements were carried out in a customized LLE kettle. The temperature of the LLE kettle was controlled with an accuracy of ±0.05 K by the constant temperature water introduced into the jacket.…”

“…To ensure the equilibrium of the system, the extraction phase and raffinate phase were sampled and analyzed after the mixture stood for 3 h in accordance with our previous report. 9 The content of 1-methylimidazole in the samples was determined by using gas chromatography with a flame ionization detector and a SE-30 capillary column (30 m × 0.32 mm × 0.33 μm). The carrier gas was high purity nitrogen.…”