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.
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