文献类型：期刊文献

英文题名：Thermal Stability and Vapor-Liquid Equilibrium for Imidazolium Ionic Liquids as Alternative Reaction Media

作者：Liu, Peng[1];Wang, Ming[1];Cheng, Zhen-Min[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：60

期号：3

起止页码：836

外文期刊名：JOURNAL OF CHEMICAL AND ENGINEERING DATA

收录：;EI(收录号：20151100643279);WOS:【SCI-EXPANDED(收录号:WOS:000351186600049)】；

语种：英文

外文关键词：Thermodynamic stability - Phase equilibria - Organic compounds - Catalysis - Solubility - Solvents - Thermogravimetric analysis

摘要：Ionic liquids (ILs) are emerging as a new family of environmentally benign solvents alternative to the conventional solvents for most catalytic reactions due to their nonvolatility. In such applications, thermal stability and solubility are vital for the selection of a suitable IL solvent for a particular reaction. In this work, the thermal stability of three commonly used imidazolium ILs (bmim[BF4], bmim[PF6], bmim[Tf2N]) was studied with both nonisothermal and isothermal thermogravimetric analysis (TGA). The decomposition kinetics indicated the relative anion stability for imidazolium based ILs was Tf2N > PF6 > BF4. In addition, the solubility data of three organic compounds (methanol, ethyl acetate, and benzene) in ILs were specified by the binary vaporliquid equilibrium (VLE) at elevated temperatures. The results indicated bmim[Tf2N] was the best solvent for the organics investigated. For the same IL, the solute with a higher polarity tends to possess a lower activity coefficient. The activity coefficients of the organic compounds agreed well with the nonrandom two-liquid (NRTL) model.