Solubility of adamantane in phosphonium-based ionic liquids

S.F. Oliveira (1) , M.G. Freire (1) , M.J. Pratas (1) , Jérôme Pauly (2) , Jean-Luc Daridon (2) , I.M. Marrucho (1) , Joao A.P. Coutinho (1)

1 CICECO - Centro de Investigacao em Materiais Ceramicaos e Compositos
2 TEFC - Thermodynamique et Energétique des fluides complexes

The solubility of adamantane was measured in eight phosphonium-based ionic liquids (ILs) having cations with different alkyl chain lengths, namely, tributyl(methyl)phosphonium, triisobutyl(methyl)phosphonium, tetraoctylphosphonium, and tetradecyltrihexylphosphonium, combined with several anions, namely, bromide, chloride, dicyanamide, methanesulfonate, methylsulfate, bistriflamide, and tosylate. The experimental measurements were carried over the temperature range from (380 to 463) K and at pressures close to 0.1 MPa. The solubility of adamantane was shown to be essentially dependent on the alkyl chain length of the IL cation and, to a lesser extent, on the nature of the IL anion. In general, higher solubilities of adamantane were observed with ILs presenting more hydrophobic character.

Keywords: Adamantanes; Alkyl chain lengths; Dicyanamide; Experimental measurements; Hydrophobic character; Methanesulfonates; Temperature range Engineering controlled terms: Alkylation; Chain length; Chlorine compounds; Ionization of liquids; Negative ions; Positive ions; Solubility; Ternary systems Engineering main heading: Ionic liquids

Domains: Chemical Physics [physics.chem-ph]

S.F. Oliveira, M.G. Freire, M.J. Pratas, Jérôme Pauly, Jean-Luc Daridon, et al.. Solubility of adamantane in phosphonium-based ionic liquids. Journal of Chemical and Engineering Data, 2010, 55 (2), pp.662-665. ⟨10.1021/je9006772⟩. ⟨hal-00683417⟩