Enhancement of Solubility of Troeger's Base in Supercritical Carbon Dioxide by Methanol

The solubility of Troeger's base (TB) in SC-C_2/CH_3OH was measured at 308K in the pressure range of 8 to 13 MPa. and methanol concentration ranges from 0 to 20 mol%. The solubility increases dramatically with methanol concentration. Comparison of solubility in supercritical CO_2 with and without 10 mol% CH3,OH in the prcssure of 8 MPa at 308K implies that both curves are steep in the lower pressure range but become smooth as the pressure increases.