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

ABSTRACT

Isobaric vapour-liquid equilibrium (VLE) data for binary systems containing m-Cresol (MC) + diisopropanolamine (DIPA) and 2, 6-dimethylphenol (DMP) + DIPA, and ternary system MC + DMP + DIPA at 20.0 kPa were measured by using a modified Othmer Still. The binary VLE experimental data showed that DIPA had stronger interaction with MC than DMP. The ternary system experimental VLE data showed that DIPA could improve the relative volatility of DMP to MC. Herington area and point tests were used to confirm the thermodynamic consistency for the two binary systems, and the results showed good thermodynamic consistency. The binary VLE experimental data were correlated by Wilson, NRTL, and UNIQUAC models, and the binary interaction parameters were obtained. VLE experimental data of the ternary system were predicted using the parameters with the aid of activity coefficient equations. The predictive results showed that Wilson model had the best prediction.