Solubility of 1,3-dialkylimidazolium chloride or hexafluorophosphate or methylsulfonate in organic solvents: effect of the anions on solubility

摘要

The solubility of 1-dodecyl-3-methylimidazolium chloride [C(12)mim][Cl] in hydrocarbons (benzene, n-octane, n-decane, n-dodecane), ethers {dipropyl ether, methyl 1,1-dimethylethyl ether (MTBE), methyl 1,1-dimethylpropyl ether (MTAE), tetrahydrofuran (THF)}has been measured by a dynamic method from 270 K to the melting point of the ionic liquid or to the boiling point of the solvent. The influence of the anion on the solubility of 1-butyl-3-methylimidazolium salts in dipropyl ether was tested. The solubility data were correlated by means of the Wilson, UNIQUAC and NRTL equations utilizing parameters derived from the solid-liquid equilibrium (SLE) data. The root-mean-square deviations of the solubility temperatures for all calculated data were higher than 1.5 K and depended on the particular equation used. (C) 2004 Elsevier B.V. All rights reserved.