VAPOR-LIQUID EQUILIBRIA OF SOLVENTS IN MIXED STRONG 1:1 ELECTROLYTES-SOLVENT SYSTEM

Shim YS; Lee CS

Korean Journal of Chemical Engineering, Vol.10, No.3, 156-163, July, 1993

Phase equilibrium calculation of electrolyte-mixed solvent systems is important in separation processes including extractive distillation. Although methods for equilibrium calculations are available in the literature, they are specific to each application and no general methods have been proposed. In the present work we extented the semiempirical method applicable to the solute properties of mixed electrolyte-mixed solvent systems to the calculation of solvent properties. In the present method excess Gibbs function was represented as the sum of Debye-Hückel term, Born term and NRTL term. Experimental data for mixed 1:1 strong electrolytes-mixed solvent systems showed close agreements with calculated values.

[References]

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Kim HD, Lee CS, HWAHAK KONGHAK, 27(4), 548 (1989)
Han GS, Jung WK, Lee CS, HWAHAK KONGHAK, 27(5), 657 (1989)
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Shim YS, Lee CS, Korean J. Chem. Eng., 8(4), 227 (1991)
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[1] Pitzer KS, Kim JJ, J. Am. Chem. Soc., 96, 5701 (1974)

[2] Chen CC, Evans LB, AIChE J., 32, 444 (1986)

[3] Evans LB, Chen CC, AIChE J., 32, 1655 (1986)

[4] Cruz J, Renon H, AIChE J., 24, 817 (1978)

[5] Kim HD, Lee CS, HWAHAK KONGHAK, 27(4), 548 (1989)

[6] Han GS, Jung WK, Lee CS, HWAHAK KONGHAK, 27(5), 657 (1989)

[7] Shim YS, Kim HD, Lee CS, HWAHAK KONGHAK, 29(5), 630 (1991)

[8] Shim YS, Lee CS, Korean J. Chem. Eng., 8(4), 227 (1991)

[9] Prausnitz JM, Lichtenthaler RN, DeAzevedo EG, "Molecular Thermodynamics of Fluid Phase Equilibria," 2nd ed., Prentice-Hall, Englewood Cliffs, N.J. (1986)

[10] Marcio JE, deGardoso M, O'Connell JP, Fluid Phase Equilib., 33, 315 (1987)

[11] Sandler SI, "Chemical Engineering Thermodynamics," Wiley, New York (1989)

[12] Conway BE, "Electrochemical Data," Greenwood Press (1969)

[13] Tsonopouls C, AIChE J., 20, 236 (1974)

[14] Ananth MS, Ramachandran S, AIChE J., 36, 3709 (1990)

[15] Gmehling J, Onken U, "Vaor-Liquid Equilibrium Data Collection," DECHEMA Chemistry Data Series, Vol. I, Part 1

[16] Robinson RA, Stokes RH, "Electrolyte Solutions," 2nd, Butterworth, London (1968)

[17] Biox E, Guerry R, Tassios D, J. Chem. Eng. Data, 24, 9 (1979)

[18] Covinton AK, Lilley TH, Robinson RH, J. Phys. Chem., 72, 2759 (1976)

[19] Reilly PJ, Wood RH, Robinson RA, J. Phys. Chem., 75, 1305 (1971)

[20] Teruya T, Hosako S, Nakano T, J. Chem. Eng. Jpn., 9, 1 (1976)