Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([CnMIM][HSO4], n = 4, 6, and 8),Journal of Chemical & Engineering Data

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Inverse Gas Chromatography: Effects of the Experimental Temperature and Molecular Structure on the Solubility Parameters of 1-Alkyl-3-methylimidazolium Hydrogen Sulfate ([CnMIM][HSO4], n = 4, 6, and 8)
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2020-10-19 , DOI: 10.1021/acs.jced.0c00594
Wenna Wang ₁ , Qiang Wang ₁ , Kaile Yu ₁

Affiliation

Thermodynamic parameters at infinite dilution for thirty-one organic solutes in a series of imidazolyl hydrogen sulfate ionic liquids (ILs) were determined by inverse gas chromatography (IGC). The IGC characterization was carried out at temperatures ranging between 303.15 and 343.15 K for determining the Hildebrand solubility parameter (δ₂) as well as the Flory–Huggins interaction parameter (χ₁₂^∞), the activity coefficient at infinite dilution (γ₁₂^∞), and the thermodynamic functions. In addition, based on the γ₁₂^∞ results, the selectivity and capacity were directly calculated for two separation problems (hexane/benzene and hexane/thiophene). Under the different effects of the three ILs, it was found that the values of χ₁₂^∞ and γ₁₂^∞ were significantly different for the solutes tested, but all the values follow a certain pattern: they increase with temperature or decrease with temperature. As the temperature increased, the solubility parameters of the three ILs showed a linear decrease trend. The solubility parameters of the three ionic liquids at room temperature were obtained by extrapolation as δ_{2([BMIM][HSO4])} = 24.15 MPa^1/2, δ_{2([HMIM][HSO4])} = 24.10 MPa^1/2, and δ_{2([OMIM][HSO4])} = 23.66 MPa^1/2.

中文翻译：

反相气相色谱：实验温度和分子结构对1-烷基-3-甲基咪唑硫酸氢盐（[C _n MIM] [HSO ₄ ]，n = 4、6和8）溶解度参数的影响

通过反相气相色谱法（IGC）确定了一系列咪唑基硫酸氢根离子液体（ILs）中31种有机溶质在无限稀释下的热力学参数。所述IGC表征在温度303.15和K之间343.15测距用于确定希尔德布兰德溶解度参数（δ进行₂）以及弗洛里-赫金斯相互作用参数（χ ₁₂^∞），活性系数在无限稀释（γ ₁₂^∞），以及热力学功能。此外，基于对γ ₁₂^∞结果，直接计算了两个分离问题（己烷/苯和己烷/噻吩）的选择性和容量。下的三个离子液体的不同的影响，我们发现χ的值₁₂^∞和γ ₁₂^∞是对于测试的溶质显著不同，但所有的值按照一定的图案：它们随温度或降低随温度增加。随着温度升高，三个IL的溶解度参数呈线性下降趋势。通过外推获得三种离子液体在室温下的溶解度参数，分别为δ2 _{（[BMIM] [HSO4]）} = 24.15 MPa ^1/2，_{δ2（[HMIM] [HSO4]）} = 24.10 MPa ^1/2，和δ_{2（[OMIM] [HSO4]）} = 23.66 MPa ^1/2。

更新日期：2020-11-12

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