Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The wastewater containing polyphenol (hydroquinone, catechol, and resorcinol) is often found in many industrial processes. Liquid-liquid extraction is a commonly used method to separate this style wastewater. The liquid liquid equilibrium for the quaternary systems of water + polyphenol (hydroquinone, catechol, and resorcinol) + methyl isobutyl ketone (MIBK) + toluene were measured at 298.15 K and 0.1 MPa. The potential for the mixture of MIBK + toluene to extract the polyphenol from its aqueous solution was examined, the distribution coefficient and selectivity were used to evaluate the extractive ability for the mixed solvent of toluene and MIBK. The results show that mixed solvent has better extraction ability compared with single extractant (MIBK). The NRTL and UNIQUAC models were used to correlate experimental data and the binary interaction parameters were obtained. The values of room-mean-square-deviation (RMSD) were used to evaluate the feasibility of the two models for the systems and all the values of RMSD were less than 2 %, which show the two models can correlate the experimental data properly.