Measurement and Thermodynamic Modeling of Ternary (Liquid + Liquid) Equilibrium for Extraction of Phenols from Dodecane with 1,4-Butanediol at 303.15 and 323.15 K

WEN-YANG FAN, ZE-YUAN CHI, XIN HUANG, ZHAO-HUI LIAO, QING-SONG LI

Abstract


The extraction process as a kind of energy-saving and environmental protection technology can be used to separate the phenols from the low-temperature coal tar. The liquid-liquid equilibrium (LLE) data of ternary systems dodecane + phenols + 1,4-butanediol were determined experimentally at 303.15 and 323.15 K under the 101.3 Kpa condition, where phenols refer to 4-ethylphenol and 2,5-xylenol. The solvent extraction capacity was assessed by the solute distribution coefficient and selectivity. Othmer-Tobias and Bachman equations were utilized to validate the correlation of the measured data, which the linear correlation (R2) ≥ 0.99. Experimental LLE data was correlated utilizing the NRTL and UNIQUAC thermodynamic models with all of the RMSD values below 0.007 meaning that each ternary system satisfactory agreement at temperatures studied.

Keywords


Liquid-liquid equilibria, Coal tar, Dodecane, Phenols, 1,4-butanediol, Thermodynamic modeling.Text


DOI
10.12783/dteees/peems2019/33966

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