Representation of Multicomponent Liquid-Liquid Equilibria for Aqueous and Organic Solutions Using a Modified UNIQUAC Model |
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Authors: | Kazuhiro Tamura Yao Chen Kaoru Tada Toshiro Yamada Isamu Nagata |
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Institution: | (1) Department of Chemistry and Chemical Engineering, Division of Physical Sciences, Kanazawa University, 40-20 Kodatsuno 2-chome, Kanazawa, Ishikawa, 920-8667, Japan |
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Abstract: | A modified form of the UNIQUAC model is presented to accurately reproducebinary phase equilibria and ternary and quaternary liquid-liquid equilibria ofaqueous and organic solutions. The model gives a good representation in thereproduction of binary coexistence curves over a wide temperature range usingtemperature-dependent parameters and of binary vapor-liquid equilibria usingtwo binary energy parameters, and in the correlation of ternary and quaternaryliquid-liquid equilibria using ternary and quaternary parameters, in addition tobinary parameters. The quaternary calculated results are compared with thoseobtained from the modified Wilson and extended UNIQUAC models. |
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Keywords: | Activity coefficient binary systems liquid-liquid equilibria mutual solubilities multicomponent quaternary systems solution models ternary systems vapor-liquid equilibria |
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