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Title: Phase equilibria measurements of ternary mixtures (sulfolane + a carboxylic acid + pentane) at 303.15 K
Authors: Xhakaza, Nokukhanya Mavis 
Bahadur, Indra 
Redhi, Gan G. 
Ebenso, Eno E. 
Keywords: Liquid–liquid equilibrium;Sulfolane;Pentane;Carboxylic acid;NRTL;UNIQUAC
Issue Date: 2015
Publisher: Elsevier
Source: Xhakaza, N.M., et al. 2015. Phase equilibria measurements of ternary mixtures (sulfolane + a carboxylic acid + pentane) at 303.15 K. Fluid Phase Algebra. 404 : 26-31.
Journal: Fluid phase equilibria 
The Liquid–liquid equilibrium (LLE) data for the mixtures of {sulfolane (1) + a carboxylic acid (2) + pentane (3)} at 303.15 K are reported, where a carboxylic acid refers to acetic acid, propanoic acid, butanoic acid, 2-methylpropanoic acid, pentanoic acid and 3-methylbutanoic acid. The shape of the binodal curves show that the solubility of pentane in (sulfolane + a carboxylic acid) is very much dependent on the carbon number and the type of carboxylic acid. The area of the two phase heterogeneous region for the carboxylic mixtures decreases in the order of acetic acid > propanoic acid > 2-methylpropanoic acid ∼ butanoic acid > pentanoic acid ∼ 3-methylbutanoic acid. Three parameter equations have been fitted to the binodal curve data. The NRTL and UNIQUAC models were used to correlate the experimental data. The NRTL model fitted the experimental data better than the UNIQUAC model with the average mean square deviation of 0.072 mole fraction as compared to 0.359 mole fraction for UNIQUAC model.
ISSN: 0378-3812
Appears in Collections:Research Publications (Applied Sciences)

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