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MEASUREMENT AND CORRELATION OF SOLUBILITY OF DISPERSE ANTHRAQUINONE AND AZO DYES IN SUPERCRITICAL CARBON DIOXIDE
Korean Journal of Chemical Engineering, January 1998, 15(1), 78-84(7), 10.1007/BF02705309
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Abstract
The solubility of three disperse anthraquinone dyes and two azo dyes in supercritical CO2 was measured. The tested dyes are Celliton fast blue B, 1-amino-2-methylanthraquinone, 1-methylaminoanthraquinone, disperse Red 1 and 4-[4-(phynylazo)phenylazo]-o-cresol. Solubility measurements were made at 313.15-393.15 K and 10-25 MPa in a high-temperature autoclave phase equilibrium apparatus. Pure physical properties of the dyes such as critical constants, molar volumes and vapor pressures were estimated based on semi-empirical methods. Also, the data were quantitatively modeled by both an empirical density correlation and a quantitative equation of state recently proposed by the present authors based on nonrandom lattice theory. We found that anthraquinone disperse dyes in general show higher solubility than azo disperse dyes in supercritical CO2 within the experimental ranges.
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References
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Chang KH, Bae HK, Shim JJ, Korean J. Chem. Eng., 13(3), 310 (1996)
Fleming GK, Koros WJ, Macromolecules, 19, 2285 (1986)
Gebert B, Saus W, Knittel D, Buschmann HJ, Schollmeyer E, Textile Res. J., 64(7), 371 (1994)
Knittel D, Saus W, Schollmeyer E, J. Textile Inst., 84, 534 (1993)
Lyman WJ, Reehl WF, Rosenblatt DH, HAND-BOOK OF CHEMICAL PROPERTY ESTIMATION METHODS, American Chemical Society, Washington, D.C. (1990)
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You SS, Yoo KP, Lee CS, Fluid Phase Equilib., 93, 215 (1994)
You SS, Lee CS, Yoo SJ, Yoo KP, J. Supercrit. Fluids, 7(4), 251 (1994)
