Abstract The thermodynamic parameters at infinite dilution for twenty-six organic solutes in 1-allyl-3-vinylimidazolium bis((trifluorompropyl)sulfonyl)imide ([AVIM][NTf2]) ionic liquid were determined by the inverse gas chromatography (IGC). The parameters encompassed the Flory-Huggins interaction parameter ( γ 12 ∞ ), the activity coefficient at infinite dilution ( γ 12 ∞ ), the thermodynamic functions ( Δ H 1 E , ∞ , Δ S 1 E , ∞ ) and the Hildebrand solubility parameter (δ2) in the temperature range of 313.15 K − 343.15 K. The values of selectivity and capacity for four separation problems as heptane (1)/benzene (2), cyclohexane (1)/benzene(2), benzene(1)/ methanol(2) , hexane(1) /1-hexene(2) were calculated from γ 12 ∞ and compared to literature values for bis((trifluorompropyl)sulfonyl)imide-based ionic liquids (ILs) for the same separation problems. The Hansen solubility parameter (δT) and its partial solubility parameters (δd, δp, δh) were also determined based on the method proposed by Voelkel and Janas. It was found that for tested solutes, the value of χ 12 ∞ was less than 4 and γ 12 ∞ value was less than 25 except for the n-alkanes. The five types of solubility parameters showed a linear decrease trend with the increase of temperature and the solubility parameters at room temperature were obtained as δ2 = 23.27, δT = 23.21, δd = 22.78, δp = 3.366, δh = 2.486 (MPa)1/2 by the extrapolation.

中文翻译：

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离子液体 1-烯丙基-3-乙烯基咪唑鎓双（（三氟丙基）磺酰基）亚胺的热力学性质的反相气相色谱表征

摘要 26种有机溶质在1-烯丙基-3-乙烯基咪唑鎓双((三氟丙丙基)磺酰基)亚胺([AVIM][NTf2])离子液体中无限稀释时的热力学参数采用反相气相色谱法(IGC)测定。参数包括 Flory-Huggins 相互作用参数 ( γ 12 ∞ )、无限稀释时的活度系数 ( γ 12 ∞ )、热力学函数 ( Δ H 1 E , ∞ , Δ S 1 E , ∞ ) 和 Hildebrand 溶解度参数(δ2) 在 313.15 K − 343.15 K 的温度范围内。 庚烷 (1)/苯 (2)、环己烷 (1)/苯 (2)、苯 (1)/ 四种分离问题的选择性和容量值甲醇(2) , 己烷(1) /1-己烯(2) 由γ 12 ∞ 计算，并与双（（三氟丙丙基）磺酰基）酰亚胺基离子液体（IL）的文献值进行比较，以解决相同的分离问题。Hansen 溶解度参数 (δT) 及其部分溶解度参数 (δd, δp, δh) 也是基于 Voelkel 和 Janas 提出的方法确定的。结果表明，对于被测溶质，除了正构烷烃外，χ 12 ∞ 值均小于4，γ 12 ∞ 值均小于25。5类溶解度参数随温度升高呈线性下降趋势，室温下溶解度参数为δ2=23.27，δT=23.21，δd=22.78，δp=3.366，δh=2.486(MPa)1/ 2 外推法。δh) 也是根据 Voelkel 和 Janas 提出的方法确定的。结果表明，对于被测溶质，除了正构烷烃外，χ 12 ∞ 值均小于4，γ 12 ∞ 值均小于25。5类溶解度参数随温度升高呈线性下降趋势，室温下的溶解度参数为δ2=23.27，δT=23.21，δd=22.78，δp=3.366，δh=2.486(MPa)1/ 2 外推法。δh) 也是根据 Voelkel 和 Janas 提出的方法确定的。结果表明，对于被测溶质，除了正构烷烃外，χ 12 ∞ 值均小于4，γ 12 ∞ 值均小于25。5类溶解度参数随温度升高呈线性下降趋势，室温下溶解度参数为δ2=23.27，δT=23.21，δd=22.78，δp=3.366，δh=2.486(MPa)1/ 2 外推法。