Multiphase Coexistence for Aqueous System with Hydrophilic Agent

Authors: G. B. Hong, H. W. Chen

Abstract:

Liquid-Liquid Equilibrium (LLE) data are measured for the ternary mixtures of water + 1-butanol + butyl acetate and quaternary mixtures of water + 1-butanol + butyl acetate + glycerol at atmospheric pressure at 313.15 K. In addition, isothermal vapor–liquid–liquid equilibrium (VLLE) data are determined experimentally at 333.15 K. The region of heterogeneity is found to increase as the hydrophilic agent (glycerol) is introduced into the aqueous mixtures. The experimental data are correlated with the NRTL model. The predicted results from the solution model with the model parameters determined from the constituent binaries are also compared with the experimental values.

Keywords: LLE, VLLE, hydrophilic agent, NRTL.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1108310

References:

[1] M. U. Pai, and K. M. Rao, “Automatic equalization for digital communication,” J. Chem. Eng. Data, vol. 11, no. 3, pp. 353–356, Jul. 1966.
[2] J. J. Malinowski, and A. J. Daugulis, “Salt effects in extraction of ethanol, 1-butanol and acetone from aqueous solutions,” AIChE J., vol. 40, no. 9, pp. 1459–1465, Sep. 1994.
[3] G. Saravanan, and D. Srinivasan, “Liquid-liquid equilibria for the system ethyl acetate-acetic acid-water in the presence of dissolved inorganic salts,” J. Chem. Eng. Data, vol. 30, no. 2, pp. 166–171, Apr. 1985.
[4] N. Peschke, and S.I. Sandler, “Liquid-Liquid Equilibria of Fuel Oxygenate + Water + Hydrocarbon Mixtures. 1,” J. Chem. Eng. Data, vol. 40, no. 1, pp. 315–320, Jan. 1995.
[5] M. J. Lee, L. H. Tsai, G. B. Hong, and H. M. Lin, “Multiphase Coexistence for Aqueous Systems with Amyl Alcohol and Amyl Acetate,” Ind. Eng. Chem. Res., vol. 41, no. 13, pp. 3247–3252, Jun. 2002.
[6] M. J. Lee, and C. H. Hu, “Multiphase Coexistence for Aqueous Systems with Amyl Alcohol and Amyl Acetate,” Fluid Phase Equilib., vol. 109, no. 1, pp. 83–98, Aug. 1995.
[7] S. M. Walas, Phase Equilibria in Chemical Engineering, Butterworth, Boston, MA, 1985.
[8] J. Gmehling, and U. Onken, Vapor-Liquid Equilibrium Data Collection-Aqueous–Organic Systems; Chemistry Data Series, Vol. 1, DECHEMA: Frankfurt, Germany, 1977.