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Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383

Abstract

SANTOS, G.R.; D'AVILA, S.G.  and  AZNAR, M.. Salt effect of KBr on the liquid-liquid equilibrium of the water/ethanol/1-pentanol system. Braz. J. Chem. Eng. [online]. 2000, vol.17, n.4-7, pp.721-734. ISSN 0104-6632.  http://dx.doi.org/10.1590/S0104-66322000000400036.

Liquid-liquid equilibrium data for the water/ethanol/1-pentanol/potassium bromide systems were experimentally determined at 25° C and 40ºC. The experimental data were correlated through the NRTL and UNIFAC-Dortmund models for the activity coefficient, with the estimation of new binary interaction parameters for both models, corresponding to the salt-solvent and solvent-solvent interactions for the NRTL model and the ion-ion and solvent-ion interactions for the UNIFAC-Dortmund model. The results obtained have shown that the NRTL model was more able to represent equilibrium data for the studied systems.

Keywords : Experimental; liquid-liquid equilibrium; electrolytes; group contribution.

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