Determination and calculation of solubility of bisphenol A in supercritical carbon dioxide

Supercritical fluid technology (SFT) as a new technique is very important for clean environment and removal of chemical pollutants. The lack of solubility data of solid solute in certain supercritical fluid is a great obstacle to the successful implementation of SFT. In this work, the solubility of bisphenol A in supercritical carbon dioxide was determined by the dynamic method at the temperatures ranging from 308 to 328 K and pressure range of 11.0–21.0 MPa. The effects of temperature and pressure on solubility were analyzed according to molecular motion theory. The solubility data were correlated using eight different semi-empirical models (Chrastil, Adachi–Lu, Kumar–Johnston, Tang, Sung–Shim, Bartle, Méndez Santiago–Teja and Yu). The comparison between different models was discussed. The thermodynamic properties (total enthalpy ΔH, enthalpy of sublimation ΔsubH and enthalpy of solvation ΔsolvH) of the solid solute were obtained.

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► The solubility of bisphenol A was determined in SCCO2.
► The thermodynamic properties (ΔH, ΔsubH and ΔsolvH) of bisphenol A were obtained.
► The experimental data were correlated using eight semi-empirical models.
► Yu model was adopted to correlate the solubility of BPA in SCCO2.