Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
J Phys Chem B. 2010 May 27;114(20):6990-4. doi: 10.1021/jp101573f.
The activity coefficients at infinite dilution, gamma(13)(infinity), for 37 solutes, alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols, thiophene, ethers, ketones, and water, in the ionic liquid 1-(3-hydroxypropyl)pyridinium trifluorotris(perfluoroethyl)phosphate [N-C(3)OHPY][FAP] were determined by gas-liquid chromatography at the temperatures from 308.15 to 358.15 K. The partial molar excess enthalpies at infinite dilution values DeltaH(1)(E,infinity) were calculated from the experimental gamma(13)(infinity) values obtained over the temperature range. The selectivities for aliphatics/aromatics hydrocarbons separation problem were calculated from the gamma(13)(infinity) values and compared to the literature values for other ionic liquids, N-methylpyrrolidone (NMP) and sulfolane. It was found that the investigated [N-C(3)OHPY][FAP] ionic liquid shows much higher selectivity and capacity at infinite dilution than the generally used organic solvents such as NMP, sulfolane, and other ionic liquids.
在 308.15 至 358.15 K 的温度下，通过气液色谱法测定了 37 种溶质（烷烃、烯烃、炔烃、环烷烃、芳烃、醇、噻吩、醚、酮和水）在离子液体 1-（3-羟丙基）吡啶三氟三（全氟乙基）膦酸盐 [N-C（3）OHPY][FAP]中的无限稀释活度系数γ（13）（∞）。从实验测定的γ（13）（∞）值范围内计算了无限稀释的偏摩尔过剩焓值ΔH（1）（E，∞）。从γ（13）（∞）值计算了脂肪族/芳烃烃类分离问题的选择性，并与其他离子液体、N-甲基吡咯烷酮（NMP）和环丁砜的文献值进行了比较。结果表明，所研究的[ N-C（3）OHPY][FAP]离子液体在无限稀释时的选择性和容量均高于常用的有机溶剂，如 NMP、环丁砜和其他离子液体。
