Determination of the solubility parameter of ionic liquid 1-allyl-3-methylimidazolium chloride by inverse gas chromatography

Some thermodynamic quantities were obtained for the interactions of ionic liquid 1-allyl-3-methylimidazolium chloride ([AMIM]Cl), with n-hexane (n-C-6), n-heptane (n-C-7), n-octane (n-C-8), n-nonane (n-C-9), chloroform, ethyl acetate, ether and acetone by the inverse gas chromatography (IGC) method in various temperatures. The thermodynamic parameters including the molar heat of sorption, weight fraction activity coefficient, Flory-Huggins interaction parameter and partial molar heat of mixing were calculated to judge the interactions between [AMIM]Cl and solvents at the studied temperatures. Also, the solubility parameter of [AMIM]Cl was found by plotting the graph of solubility parameters of probes. The results showed that the selected solvents n-C-6, n-C-7, n-C-8, n-C-9, ethyl acetate, ether and acetone were poor solvents for [AMIM]Cl, while chloroform was a favorite solvent for [AMIM]Cl. The solubility parameter of [AMIM]Cl was calculated to be 23.33 (J.cm(-3))(0.5) (343.15 K), 22.57 (J.cm(-3))(0.5) (353.15 K), 21.63 (J.cm(-3))(0.5) (363.15 K), and 20.88 (J.cm(-3))(0.5) (373.15 K) by IGC. (C) 2013 Elsevier B.V. All rights reserved.