Prediction of liquid–liquid equilibrium for ternary systems containing ionic liquids with the tetrafluoroborate anion using ASOG

Liquid–liquid equilibrium (LLE) data for different systems involving ionic liquids are essential for design, optimization and operation of separation processes, such as recovery of valuable products and remotion of polluting agents in effluents. In this work, the ASOG model for the activity coeffici...

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Bibliographic Details
Published in:Fluid phase equilibria 2010-09, Vol.296 (2), p.154-158
Main Authors: Robles, Pedro A., Graber, Teófilo A., Aznar, Martín
Format: Article
Language:English
Subjects:
ASOG
Chemistry
Exact sciences and technology
General and physical chemistry
Ionic liquids
Liquid-liquid equilibria
Liquid–liquid equilibrium
Phase equilibria
Prediction
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Summary:Liquid–liquid equilibrium (LLE) data for different systems involving ionic liquids are essential for design, optimization and operation of separation processes, such as recovery of valuable products and remotion of polluting agents in effluents. In this work, the ASOG model for the activity coefficient is used to predict LLE data for 32 ternary systems at 101.3 kPa and several temperatures; all the systems are formed by ionic liquids including the tetrafluoroborate anion plus alkanes, alkenes, cycloalkanes, alkanols, ketones, carboxylic acids, esters and aromatics. New group interaction parameters were determined by using a modified Simplex method, minimizing a composition-based objective function. The results, in terms of mean deviation between the experimental and calculated compositions, are satisfactory, with rms deviations of about 4%.
ISSN:0378-3812
1879-0224
DOI:10.1016/j.fluid.2010.03.018