Subject Area物理化学
Gas-liquid chromatography measurements of activity coefficients at infinite dilution of organic solutes in 1-alkyl-3-methylimidazolium bis(oxalato)borate
Yan PF(颜佩芳); Yang M(杨淼); Li ZP(李长平); Liu XM(刘秀梅); Wang C(王畅); Tan ZC(谭志诚); UrsWelz-Biermann
Conference Name21st IUPAC International Conference on Chemical Thermodynamics
Conference Date2010-7-31
Conference PlaceJapan
Funding OrganizationInternational Union of Pure and Applied Chemistry (IUPAC)
AbstractResearch of ionic liquids (ILs) is one of the most rapidly growing fields in the past years, much of which has the ultimate aim of large scale industrial application. Due to their unique properties such as negligible vapor pressure at room temperature, stable liquid phase over a wide temperature range and stability at high temperatures, ionic liquids created interest to use them in synthesis and extraction processes for the reduction of the amount of volatile organic solvents (VOSs) used for industry. So, it is very important to know how they interact with different solutes. Activity coefficients at infinite dilution of a solute i ( 1 i )can be used to quantify the volatility of the solute as well as to provide information on the intermolecular energy between solvent and solute [2,3]. Values of 1 i are also important for evaluating the potential uses of ILs in liquid-liquid extraction and extractive distillation. In this study, activity coefficients at infinite dilution, 1 i values for 23 solutes: alkanes, cycloalkanes, 1-alkenes, 1-alkynes, benzene, alkylbenzenes, and alcohols in the ionic liquids 1-butyl-3-methylimidazolium bis(oxalato)borate [BMIM][BOB] and 1-hexyl-3-methyl-imidazolium bis(oxalato)borate [HMIM][BOB] over the temperatures range (308 to 348) K have been measured. The partial molar excess enthalpies at infinite dilution, HE;1 1 , of these solutes in the ionic liquids were also derived from the temperature dependence of the 1 i values. This work also intends to provide information about the slight modification in the length of these substituents and its influence on the value of 1 i and selectivity of ionic liquids based on the bis(oxalato)borate anion.
Document Type会议论文
Corresponding AuthorTan ZC(谭志诚)
Recommended Citation
GB/T 7714
Yan PF,Yang M,Li ZP,et al. Gas-liquid chromatography measurements of activity coefficients at infinite dilution of organic solutes in 1-alkyl-3-methylimidazolium bis(oxalato)borate[C],2010:129/2.
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