Solubilities of <i>p</i>-Quinone and 9,10-Anthraquinone in Supercritical Carbon Dioxide

Abstract

Equilibrium solubilities of p -quinone (1,4-benzoquinone) and 9,10-anthraquinone at 35 °C and 45 °C in supercritical carbon dioxide over a pressure range of about (85−300) bar have been measured using a supercritical fluid extractor coupled with a high-pressure liquid chromatography apparatus. The solubility results, along with those reported in the literature for 1,4-naphthoquinone, are correlated with a modified Peng−Robinson equation of state.