Liquid–liquid equilibria for quaternary mixtures of nonane + undecane + (benzene or toluene or m-xylene) + sulfolane at 298.15 and 313.15 K |
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Authors: | Rilvia S. Santiago,Martí n Aznar |
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Affiliation: | School of Chemical Engineering, State University of Campinas, UNICAMP, P.O. Box 6066, 13081-970 Campinas, SP, Brazil |
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Abstract: | Liquid–liquid equilibrium (LLE) data were measured for three quaternary systems containing sulfolane, nonane + undecane + benzene + sulfolane, nonane + undecane + toluene + sulfolane and nonane + undecane + m-xylene + sulfolane, at T = 298.15 and 313.15 K and ambient pressure. The experimental quaternary liquid–liquid equilibrium data have been satisfactorily represented by using NRTL and UNIFAC-LLE models for the activity coefficient. The calculated compositions based on the NRTL model were found to in a better agreement with the experiment than those based on the UNIFAC-LLE model. |
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Keywords: | Liquid&ndash liquid equilibrium Quaternary mixtures Sulfolane |
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