文摘
Infinite dilution (limiting) partition coefficients of several sulfur-containing aromatics (benzo[b]thiophene, benzothiazole, dibenzothiophene, 4,6-dimethyldibenzothiophene, phenoxathiin, and thianthrene) in a biphasic (1-n-butyl-3-methylimidazolium methyl sulfate ([bmim][MeSO<sub>4sub>]) + carbon dioxide) system were measured at temperatures of (313 to 353) K and pressures of (8.5 to 23.2) MPa. The measurement method was capillary column supercritical fluid chromatography (SFC) with [bmim][MeSO<sub>4sub>] serving as the stationary liquid and supercritical CO<sub>2sub> as the carrier fluid. Partition coefficients of sulfur-containing aromatics are discussed as functions of temperature and CO<sub>2sub> density. In addition, other solute partition coefficient data obtained from previous SFC measurements in the systems with ionic liquids [bmim][PF<sub>6sub>], [bmim][BF<sub>4sub>], [bmim][MeSO<sub>4sub>], [hmim][Tf<sub>2sub>N], and [thtdp][Cl] are reported in the Supporting Information.