CONTINUOUS THERMODYNAMIC CALCULATION OF SOL-GEL PHASE EQUILIBRIA FOR POLYDISPERSE PETROLEUM RESINS

Lee SY; Kim SY; Yoo KP

Korean Journal of Chemical Engineering, Vol.10, No.1, 10-17, January, 1993

We present a continuous thermodynamic framework which utilizes the Flory-Huggins theory for calculating sol-gel phase equilibrium properties of polydisperse petroleum resins. The sample resins are separated into sol and gel phases by n-hexane at 10-30℃ for 5-12 hours. The molecular weight distributions for feed resin and subsequently separated sol and gel phases are determined by gel-permeation chromatograph and they are correlated by the gamma distribution function. The equilibrium distribution coefficients between sol and gel phases are modeled by the modified Flory-Huggins equation in which the mole fractions are replaced by a continuous distribution variable index. We found that the Flory-Huggins model with the continuous thermodynamic frame-work fits the measured sol-gel phase equilibrium data well for a wide range of separation conditions.

[References]

Hayashi H, Org. Synth. Chem., 36(6), 533 (1978)
Mayo FR, Walling C, Chem. Rev., 46, 277 (1950)
Tung LH, Fractionation of Synthetic Polymers-Principles and Practices, Marcel Dekker, Inc., New York (1977)
Gualtierie JA, Kincaid JM, Morrison G, J. Chem. Phys., 77, 521 (1982)
Salacuse JJ, Stell G, J. Chem. Phys., 77, 3714 (1982)
Ratzsch MT, Kehlen H, Fluid Phase Equilib., 14, 225 (1983)
Kehlen H, Ratzsch MT, Bergmann J, AIChE J., 31, 1136 (1985)
Cotterman RL, Bender R, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 194 (1985)
Cotterman RL, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 434 (1985)
Wang SH, Whiting WB, Can. J. Chem. Eng., 65, 651 (1987)
Cotterman RL, Dimitrelis D, Prausnitz JM, Ber Bunsenges. Phys. Chem., 88, 796 (1984)
Shibata SK, Sandler SI, Behrens RA, Chem. Eng. Sci., 42(8), 1977 (1987)
Willman BT, Teja AS, AIChE J., 32(12), 2067 (1986)
Willman BT, Teja AS, Ind. Eng. Chem. Res., 26, 953 (1987)
Yoo SJ, Lee SY, Yoo KP, Korean J. Chem. Eng., 9(2), 89 (1992)
Riazi MR, Ind. Eng. Chem. Res., 28, 1731 (1989)

[Referenced By]

[1] Hayashi H, Org. Synth. Chem., 36(6), 533 (1978)

[2] Mayo FR, Walling C, Chem. Rev., 46, 277 (1950)

[3] Tung LH, Fractionation of Synthetic Polymers-Principles and Practices, Marcel Dekker, Inc., New York (1977)

[4] Gualtierie JA, Kincaid JM, Morrison G, J. Chem. Phys., 77, 521 (1982)

[5] Salacuse JJ, Stell G, J. Chem. Phys., 77, 3714 (1982)

[6] Ratzsch MT, Kehlen H, Fluid Phase Equilib., 14, 225 (1983)

[7] Kehlen H, Ratzsch MT, Bergmann J, AIChE J., 31, 1136 (1985)

[8] Cotterman RL, Bender R, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 194 (1985)

[9] Cotterman RL, Prausnitz JM, Ind. Eng. Chem. Process Des. Dev., 24, 434 (1985)

[10] Wang SH, Whiting WB, Can. J. Chem. Eng., 65, 651 (1987)

[11] Cotterman RL, Dimitrelis D, Prausnitz JM, Ber Bunsenges. Phys. Chem., 88, 796 (1984)

[12] Shibata SK, Sandler SI, Behrens RA, Chem. Eng. Sci., 42(8), 1977 (1987)

[13] Willman BT, Teja AS, AIChE J., 32(12), 2067 (1986)

[14] Willman BT, Teja AS, Ind. Eng. Chem. Res., 26, 953 (1987)

[15] Yoo SJ, Lee SY, Yoo KP, Korean J. Chem. Eng., 9(2), 89 (1992)

[16] Riazi MR, Ind. Eng. Chem. Res., 28, 1731 (1989)