期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 279, 期 -, 页码 370-377出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2019.01.141
关键词
Formate-based ionic liquids; Concentrated aqueous solution; Salting-out phase separation; Thermophysical properties
资金
- Natural Science Foundation of China [21503050, 21464005]
- Construction Project of Key Laboratories of Guizhou Provincial Education Department [QJHKY[2015]329]
- Natural Science Foundation of Guizhou Province [QKHJC[2016]1111, QKHJC[2017]1137]
- Natural Science Foundation of Shanxi [201701D121016]
- Guizhou Education University
In this study, the anion exchange reaction of an organic cation chloride with excess KHCO(2 )to synthesize formatebased ionic liquids (ILs) was performed in water, and the water-miscible IL products were easily obtained via salting-out phase separation caused by the excess KHCO2. According to the synthesis results, a set of heuristic rules could be generated as follows. First of all, the more hydrophobic ILs required less amount of excess KHCO(2 )for salting-out phase separation. Secondly, the amphiphilic ILs with a long cationic alkyl chain (e.g., octyl) are likely to form reverse micelles to encapsulate inorganic salt (i.e., KCl), resulting in relatively high residual contents of K(+ )and Cl-. Lastly, cooling would exert a positive effect on the salting-out phase separation and thus expand the application range of this method. For example, [C-2-MIm]HCO2 was prepared at -18 degrees C, because it has to be phase-separated out by cooling. The basic properties of these ILs were also thoroughly characterized and analyzed, such as melting point, thermal decomposition temperature, density, refractive index, surface tension, viscosity and conductivity etc. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据