Key words: acetylsalicylic acid, supercritical carbon dioxide, FTIR spectroscopy, solubility
Solubility of acetylsalicylic acid (ASA) in supercritical carbon dioxide (SC-CO2) is
studied using FTIR spectroscopy by measuring the integral intensities of the ASA
absorption band in the region of 1199 cm-1 as the function of time during the dissolution
of varied amounts of ASA placed into the cell. The mole fractions of ASA in its saturated
solutions in SC-CO2 at 40 °C are (2.1 ± 0.25) ⋅10-4 and
(11.0 ± 1.5) ⋅10-4 at 10.0 and 15.0 MPa,
respectively.
doi:10.1134/S1990793116080030