Measurement and correlation of (liquid+liquid) equilibrium of the azeotrope (cyclohexane+2-butanone) with different ionic liquids at T=298.15K

UNIQUAC correlation of liquid–liquid equilibrium in systems involving ionic liquids: The DFT–PCM approach

“…They obtained the equilibrium geometry of the molecule using Gaussian 98 in the ideal gas phase from ); for these ionic liquids, the values of r in this work are slightly smaller than those reported by the authors, but the values of q are very similar. Naydenov and Bart [25] used r and q from an empirical correlation proposed by Domanska [52]; Sahoo et al [26] used the same parameters reported by Banerjee et al [24]; Simoni et al [27] used r and q reported by Kato et al [53][54][55], determined from VLE data and estimated according to Bondi [43]; Pereiro and Rodríguez [28,29] used r and q presented by Banerjee et al [24]; and finally, Alonso et al [30,31] used the same r and q calculated by Kato et al [53][54][55]. Table 4 shows the UNIQUAC energy interaction parameters estimated by the minimization of Eq.…”

“…Due to lack of pure component volume and area parameters for ionic liquids, the UNIQUAC model [22] could not be widely used for correlating the experimental data. At the present time, only a few works [23][24][25][26][27][28][29][30][31] have tried to correlate LLE data for ternary systems including ionic liquids by the UNIQUAC model. Sahandzhieva et al [23] studied systems involving the ionic liquid [bmim][PF 6 ]; Banerjee et al [24] …”

Mezclas binarias de líquido iónico con solvente molecular: Predicción del volumen de exceso molar desde índices de refracción

“…Desviaciones de predicción para el volumen de exceso molar a 298.15 K para las mezclas binarias con los métodos Ι, ΙΙ y ΙΙΙ En este grupo, se analizan nueve mezclas binarias de tres líquidos iónicos (BMIM-PF 6 , HMIM-PF 6 y OMIM-PF 6 ), donde se deja fija la estructura del anión (hexafluorofosfato), y se varía la longitud de la cadena alquílica del catión de imidazolio (butil, hexil y octil), mezclados cada uno con etanol, 2-butanona y acetato de etilo. A 298.15 K, se reportan volúmenes de exceso molar negativos para las nueve mezclas [23], [24], [25] y [26].…”

Applications of Ionic Liquids in Azeotropic Mixtures Separations

“…The azeotropic mixture cyclohexane + 2-butanone occurs in the process for purifying grafted polyolefins (Gupta & Carey, 2006) and its separation is made by membrane in conjunction with a dephlegmation (Wijmans et al, 2005 (Pereiro & Rodriguez, 2008b). (Pereiro & Rodriguez, 2008b) than the [C 8 MIM] [PF 6 ], indicating that it would be a better choice as solvent for this azeotropic separation.…”

“…(Pereiro & Rodriguez, 2008b) than the [C 8 MIM] [PF 6 ], indicating that it would be a better choice as solvent for this azeotropic separation. The analysis of the data indicate that the increase of alkyl chain length of the imidazolium decreases the capability of the [C n MIM] [PF 6 ] to purify the cyclohexane from the azeotropic mixture.…”