Fevereiro 2015 vol. 1 num. 2 - XX Congresso Brasileiro de Engenharia Química

Artigo - Open Access.

Idioma principal

LIQUID-LIQUID EQUILIBRIA FOR THE SYSTEM COMPOSED BY WATER, ACETIC ACID, AND 1-HEXANOL AT 293.15 K AND UNDER ATMOSPHERIC PRESSURE USING REFRACTOMETRY AND DENSITOMETRY

HOMRICH, P. O. B. ; CERIANI, R. ;

Artigo:

In order to evaluate the accuracy of an indirect quantification method, the liquid-liquid equilibrium for the ternary system composed by water, acetic acid and 1-hexanol at 293.15 K and at atmospheric pressure was determined by means of refractometry and densitometry. The binodal curve was measured using the cloud point method, while the tie-lines were obtained in a cell-glass where the mixture was vigorously stirred and maintained at constant temperature. After the completeness of phase separation, samples were collected using simple syringe needles and the concentration of all components were satisfactorily obtained using the relation between the refraction index and density with the binodal curve sample concentrations. Generated data were correlated using NRTL model, and their quality were verified by Othmer-Tobias and Hand tests. All the results were compared with a previous work which quantified the equilibrium phases by means of a direct method (gas-chromatographic analysis). The indirect method were very efficient, resulting in two equations that related the physical properties with sample concentrations with an average relative deviations between the experimental and calculated physical properties lower than 0.01%. NRTL model parameters were regressed and the mean deviation was 0.61. Othmer-Tobias and Hand tests presented coefficients of determination of 0.9984 and 0.9975, indicating the high quality of these data.

Artigo:

Download (PDF)

Palavras-chave:

DOI: 10.5151/chemeng-cobeq2014-0903-22646-182063

Referências bibliográficas
  • [1] ALMEIDA, B. F.; WALDRIGUI, T. M.; ALVES, T. C.; OLIVEIRA, L. H.; AZNAR, M. Experimental and calculated liquid–liquid equilibrium data for water + furfural + solvents. Fluid Phase Equilibria, v. 334, p. 97-105, 2012.
  • [2] BATISTELL, M. C.; ALVES, T. C.; GUADAGNINI, T. R.; OLIVEIRA, L. H.; AZNAR M. (Liquid + liquid) equilibria in {water + acrylic acid + (1-butanol, or 2-butanol, or 1-pentanol)} systems at T = 293.2 K, T = 303.2 K, and T = 313.2 K and atmospheric pressure. J. Chem. Thermodynamics, v. 43, p. 1381-1388, 2011.
  • [3] GEANKOPLIS, C. J. Transport Processes and Separation Process Principles. New Jersey: Editora Prentice Hall, 200
  • [4] HAND, D. B. Dineric Distribution. J. Phys. Chem., v. 34, p. 1961-2000, 1930.
  • [5] JUANG, R. S.; HUANG, R. H.; WU, R. T. Separation of citric and lactic acids in aqueous solutions by solvent extraction and liquid membrane processes. J. Membrane Science, v. 136, p. 89-99, 1997.
  • [6] KUBOTA, F.; MASAHIRO, G. Application of ionic liquids to solvent extraction. Solv. Extraction Research and Development, v. 13, p. 23-36, 200
  • [7] LIU, J.; YUAN, Y.; PAN, Y.; HUANG, Z.; YANG, B. Liquid–liquid equilibrium for systems of glycerol and glycerol tert-butyl ethers. Fluid Phase Equilibria, v. 365, p. 50-57, 2014.
  • [8] LO, C. T., Andamp; BAIRD, M. H. Solvent Extraction. In R. A. MEYERS, Encyclopedia of Physical Science and Technology. Editora Elsevier Science, 2001.
  • [9] Área temática: Engenharia das Separações e Termodinâmica 7OTHMER, D. F.; TOBIAS, P. E. Tie-line Correlation. Ind. and Eng. Chem., v. 34, p. 693-6, 1942.
  • [10] RENON, H.; PRAUSNITZ, J. M. Local compositions in thermodynamic excess functions for liquid mixtures. AlChe J., v. 14, p. 135-144, 1968.
  • [11] ROCHA, E. G. A.; FOLLEGATTI, L. A. R.; DUVOISIN, S. J.; AZNAR M. Liquid–liquid equilibria for ternary systems containing ethylic palm oil biodiesel + ethanol + glycerol/water: Experimental data at 298.15 and 323.15 K and thermodynamic modeling. Fuel, v. 128, p. 356-365, 2014.
  • [12] RODRIGUES C. E. C.; GONÇALVES C. B.; BATISTA E.; MEIRELLES A. J. A. Deacidification of Vegetable Oils by Solvent Extraction. Recent Patents on Engineering, v. p. 95-102, 2007.
  • [13] SENOL, A. Phase equilibria for ternary liquid systems of (water + carboxylic acid or alcohol + 1-hexanol) at T= 293.15 K: modelling considerations. J. Chem. Thermodynamics, v. 36, p.1007-1014, 2004.
  • [14] SENOL, A. Liquid–Liquid Equilibria for Mixtures of (Water + Pyruvic Acid + Alcohol/Alamine). Modeling and Optimization of Extraction. J. Chem. Eng. Data, v. 58 p. 528-536, 2013.
  • [15] STEVENS G. W.; LO, T. C.; BAIRD, M. H. I. Extraction, Liquid-Liquid. In K. OTHMER, Encyclopedia of Chem. Tech., Editora John Wiley Andamp; Sons, 2007.
  • [16] STOICESCU, C.; IULIAN, O.; SIRBU F. Liquid + Liquid Equilibrium Data for the Ternary Mixtures of 1-Propanol + Water with 1-Butanol, 1-Hexanol, 1-Octanol, or 1-Decanol at 294.15 K. Revue Roumaine de Chimie, v. 53, p. 1117-1123, 2008.
  • [17] STRAGEVITH, L.; Andamp; D''AVILA, S. G. Application of a Generalized Maximum Likelihood Method in the Reduction of Multicomponent Liquid-Liquid Equilibrium Data. Brazil J. of Chem. Eng., 14, p. 41-52, 1997.
  • [18] TAHA, M.; TENG, H.; LEE M. Phase diagrams of acetonitrile or (acetone + water + EPPS) buffer phase separation systems at 298.15 K and quantum chemical modeling. J. Chem. Therm., v. 54, p. 134-141, 2012.
  • [19] YU, Y. X.; LIU, J. G.; GAO, G. H. Isobaric Vapor-Liquid Equilibria and Excess Volumes for the Binary Mixtures Water + Sulfolane, Water + Tetraethylene Glycol, and Benzene + Tetraethylene Glycol. J. Chem. Eng. Data, 45, p. 570-574, 2000.
  • [20] Acknowledgements: R Ceriani thanks FAPESP, CNPq and CAPES for financial support and individual grants
Como citar:

HOMRICH, P. O. B.; CERIANI, R.; "LIQUID-LIQUID EQUILIBRIA FOR THE SYSTEM COMPOSED BY WATER, ACETIC ACID, AND 1-HEXANOL AT 293.15 K AND UNDER ATMOSPHERIC PRESSURE USING REFRACTOMETRY AND DENSITOMETRY", p. 15291-15298 . In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 2359-1757, DOI 10.5151/chemeng-cobeq2014-0903-22646-182063

últimos 30 dias | último ano | desde a publicação


downloads


visualizações


indexações