Physicochemical properties and activity coefficients at infinite dilution for organic solutes and water in a novel bicyclic guanidinium superbase-derived protic ionic liquid
Urszula Domańska-Żelazna , Marek Królikowski , W. E. Acree , G.A. Baker
AbstractThe activity coefficient at infinite dilution, View the MathML source, was determined by gas–liquid chromatography at temperatures from T = 308.15 to T = 348.15 K for 54 assorted solutes—among them, alkanes (linear, branched, or cyclic), alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, tetrahydrofuran, 1,4-dioxane, ethers, acetone, ketones, acetonitrile, pyridine, and 1-nitropropane—in the novel bicyclic guanidine superbase-derived protic ionic liquid 1,3,4,6,7,8-hexahydro-1-methyl-2H-pyrimido[1,2-a]pyrimidine bis(pentafluoroethyl)sulfonylimide, [MTBDH][BETI]. The partial molar excess Gibbs free energy View the MathML source, the partial molar excess enthalpy View the MathML source, and entropy at reference temperature View the MathML source at infinite dilution were calculated from the experimental View the MathML source values obtained over this temperature range. The gas–liquid partition coefficient, KL, was calculated for each solute and discussed in light of the Abraham solvation parameter model. The density of the IL as a function of temperature was also measured. The selectivities for heptane/benzene, heptane/thiophene, heptane/pyridine, and heptane/nitropropane separation problems were calculated from View the MathML source and compared to literature values for select ILs, as these separation problems are central to the petroleum industry.
|Journal series||Journal of Chemical Thermodynamics, ISSN 0021-9614|
|Publication size in sheets||0.5|
|Keywords in English||[MTBDH][BETI], Activity coefficients at infinite dilution, Thermodynamics, Density, The Abraham solvation parameter model|
|ASJC Classification||; ;|
|Score|| = 30.0, 01-02-2020, ArticleFromJournal|
= 35.0, 01-02-2020, ArticleFromJournal
|Publication indicators||= 19; : 2013 = 1.234; : 2013 = 2.423 (2) - 2013=2.399 (5)|
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