Asymmetric Framework for Predicting Liquid−Liquid Equilibrium of Ionic Liquid−Mixed-Solvent Systems. 2. Prediction of Ternary Systems

In various ternary systems of the type polymer A – polymer B – solvent S, a dip or peak has been observed in the [η] – cB curve at the critical concentration of polymer B. ([η] is the intrinsic viscosity of A in mixed solvent consisting of B and S, and cB is the concentration of B in this mixed solvent.) It is shown that such a critical concentration effect is most likely to occur when the solvent is poor for polymer B, and will be the larger the poorer the solvent.Evidence is also presented in support of the hypothesis that if, as is usual, the two polymers repel each other, the effect is a dip if the solvent is good for polymer A and is a peak if the solvent is sufficiently poor for polymer A.Critical concentrations of polystyrene, polyvinyl acetate, and polymethyl methacrylate (five different samples) have been measured in this way in 12 different ternary systems. These observed critical concentrations are in good agreement with values calculated using the equation previously described, according to which the critical concentration of a polymer is inversely proportional to its intrinsic viscosity in the solution.

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Liquid−Liquid Equilibrium of Ternary Systems of Cyclohexane + (Benzene, + Toluene, + Ethylbenzene, or +o-Xylene) + 4-Methyl-N-butyl Pyridinium Tetrafluoroborate Ionic Liquid at 303.15 K

Journal of Chemical & Engineering Data ◽

10.1021/je7007268 ◽

2008 ◽

Vol 53 (8) ◽

pp. 1708-1712 ◽

Cited By ~ 75

Author(s):

Samir I. Abu-Eishah ◽

Ali M. Dowaidar

Keyword(s):

Ionic Liquid ◽

Ternary Systems ◽

Liquid Equilibrium ◽

Benzene Toluene

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Isobaric Vapor–Liquid Equilibrium of tert-Butyl Alcohol + Water + Triethanolamine-Based Ionic Liquid Ternary Systems at 101.3 kPa

Journal of Chemical & Engineering Data ◽

10.1021/je501098j ◽

2015 ◽

Vol 60 (7) ◽

pp. 2018-2027 ◽

Cited By ~ 13

Author(s):

Zhigang Zhang ◽

Qiang Zhang ◽

Qinqin Zhang ◽

Tao Zhang ◽

Wenxiu Li

Keyword(s):

Ionic Liquid ◽

Ternary Systems ◽

Butyl Alcohol ◽

Liquid Equilibrium ◽

Vapor Liquid Equilibrium ◽

Tert Butyl ◽

Tert Butyl Alcohol ◽

Alcohol Water ◽

Vapor Liquid

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Some information on calculating the liquid-liquid equilibrium of ternary systems. an improvement of prediction of liquid-liquid equilibrium in ternary systems from binary equilibrium data

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19821420 ◽

1982 ◽

Vol 47 (5) ◽

pp. 1420-1432 ◽

Cited By ~ 5

Author(s):

Július Surový ◽

Ján Dojčanský ◽

Soňa Bafrncová

Keyword(s):

Polar Solvent ◽

Ternary Systems ◽

Correct Prediction ◽

Liquid Equilibrium ◽

Partially Miscible ◽

Nrtl Equation ◽

Equilibrium Data ◽

Solvent Systems ◽

Kister Equation ◽

Mutual Solubilities

A possibility is described of improving the prediction of ternary liquid-liquid equilibrium data from binary ones by using three-parameter equations for calculating activity coefficients. The parameters for completely miscible pairs of liquids were determined from their vapour-liquid equilibrium data and those for partially miscible pairs of liquids from their mutual solubilities and from one limiting activity coefficient. A quantitatively correct prediction of the liquid-liquid equilibrium data was achieved in all cases by means of three different equations (NRTL equation, Redlich-Kister equation and Wilson equation modified by Novák and coworkers) in four hydrocarbon-hydrocarbon-polar solvent systems investigated.

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