Sj. Macnaughton et al., SOLUBILITY OF ANTIINFLAMMATORY DRUGS IN SUPERCRITICAL CARBON-DIOXIDE, Journal of chemical and engineering data, 41(5), 1996, pp. 1083-1086
Supercritical fluid extraction is a potential technique for the purifi
cation of pharmaceutical products containing residual solvents. The so
lubilities of the drugs in supercritical carbon dioxide are being meas
ured as part of a program in which the potential applications of this
technology are being investigated. The solubilities of three inhibitor
s of inflammatory activity, Ketoprofen, Piroxicam, and Nimesulide, in
supercritical CO2, measured using a dynamic saturation technique, are
reported at pressures between 100 bar and 220 bar and at two temperatu
res: 312.5 K and 331.5 K. These chemicals have relatively high solubil
ities with values ranging from 4 x 10(-6) to 15 x 10(-4) mole fraction
. The solubilities exhibit a clear dependence on the solvent density,
and this has been used to provide a simple and precise correlation of
the data.