The isobaric vapor–liquid equilibrium measurements for the systems of 2-butyl acetate with three chemicals (methanol, 2-butyl alcohol, methyl acetate) were determined respectively in a modified Rose still at 101.33 kPa. Thermodynamic consistency of the three binary vapor–liquid equilibrium data had been confirmed by Herington methods. The three groups of experimental data were all correlated with NRTL and Wilson models, respectively. The binary interaction parameters of both models had been obtained by the simplex method. The NRTL and Wilson equations showed low deviation with respect to the experimental data.

A good activated carbon adsorbent, KC-8, was used to remove residual p-xylene (PX) effectively after the extraction process of treating pure terephthalic acid (PTA) wastewater. The adsorption thermodynamics and kinetics of PX on activated carbon KC-8 were investigated completely and systematically. A series of adsorption equilibrium experiments were conducted under temperatures of (313.15, 323.15, and 333.15) K. The adsorption equilibrium data were fitted to Langmuir and Freundlich isothermal equations. The results showed that the adsorption equilibrium data were agreed with the Freundlich isothermal equation well. Thermodynamic analysis suggested ΔH > 0, ΔG < 0, and ΔS > 0. The adsorption of PX on KC-8 was a spontaneous physical and endothermic adsorption process. Kinetic studies indicated that the adsorption process of PX on activated carbon KC-8 could be described well by the pseudosecond-order kinetic model, and particle diffusion was the main rate-controlling step in the adsorption process.

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This paper aims to present the feasibility of conducting the transesterification of propylene glycol ether (PM) with methyl acetate (MeAc) in a reactive distillation (RD) column to improve the reaction conversion. The essential thermodynamic and reaction kinetic data of the reaction system were measured for the feasibility study. There is only one azeotrope, MeAc−MeOH, in the reaction system, and the NRTL model could describe well the thermodynamic behavior of this system. The transesterification of PM with MeAc is an endothermic reaction with activation energy E = 55.704 kJ•mol −1 . The feasibility was analyzed by residue curve maps (RCM), showing that full conversion of PM could be realized by RD with a mole ratio of MeAc−PM larger than 2.882. The intensification effect was experimentally verified in a batch RD column. Finally, some important parameters are given through the conceptual design to develop a continuous RD column for the transesterification of PM with MeAc.

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