化学
离子液体
活度系数
稀释
环烷烃
吉布斯自由能
分配系数
噻吩
酰胺
有机化学
热力学
物理化学
水溶液
物理
催化作用
标识
DOI:10.1016/j.jct.2015.02.024
摘要
The activity coefficients at infinite dilution, γ13∞ and (gas + liquid) partition coefficients, KL for 61 solutes: alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, esters, butanal, nitrogen compounds and water in the ionic liquid 4-(3-hydroxy)-4-methylmorpholinium bis(trifluoromethylsulfonyl)-amide were determined by (gas + liquid) chromatography at the temperatures from (298.15 to 368.15) K. The partial molar excess Gibbs free energies ΔG1E,∞, enthalpies ΔH1E,∞ and entropies ΔS1E,∞ at infinite dilution were calculated from the experimental γ13∞ values obtained over the temperature range. The selectivities and capacities at infinite dilution for selected extraction problems (water/butanol, hexane/benzene, heptane/thiophene) were calculated from the γ13∞ and compared to the literature values for other ionic liquids based on bis(trifluoromethylsulfonyl)-amide anion. The values of KL were used to determine the linear free energy relationship (LFER) system constants as a function of temperature. The density and viscosity of the investigated ionic liquid at temperatures from (298.15 to 368.15) K as well as other physicochemical properties: temperature of fusion and glass transition temperature were also measured.
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