Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6619427 | Fluid Phase Equilibria | 2016 | 9 Pages |
Abstract
In this work, we studied the aqueous solubility, vapor pressures of dibutylphthalate (DBP) and di-isobutylphthalate (DIBP) as a function of temperature between 298.15 and 328.15Â K and between 313.15 and 423.15Â K respectively. The octanol-water partition coefficient was measured at 298.15Â K using shake-flask method. For aqueous solubility, measurements were carried out using the dynamic saturation method and values ranges in 10â7Â mol fraction with a relative higher solubility for DIBP regarding DBP. Solubility results are in good agreement with the octanol-water partition coefficient measurement showing that DBP is more hydrophobic than its isomer DIBP. For vapor pressure, after an interlaboratory validation step using static method performed with DBP in a temperature range between 381 and 421Â K, measurements for both compounds DBP and DIBP using the gas saturation method presented a standard relative deviation lower than 2% and values ranged from 10â2 and 102Â Pa. By combining vapor pressure and solubility results, we calculated Henry's law constant and air-water partition coefficient and showed an important deviation between the two isomers even at low temperature.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
H. Ishak, J. Stephan, R. Karam, C. Goutaudier, I. Mokbel, C. Saliba, J. Saab,