The selectivity of imidazolium-based ionic liquids with different anions to BTX aromatics in hexane at 298.15 K and atmospheric pressure
详细信息 查看全文
- 作者：Kyeong-Ho Lee ; Soo-Hyun You ; So-Jin Park
- 关键词：Liquid ; liquid Equilibrium ; Separation ; Aliphatic ; Aromatic ; Ionic Liquid
- 刊名：Korean Journal of Chemical Engineering
- 出版年：2016
- 出版时间：October 2016
- 年：2016
- 卷：33
- 期：10
- 页码：2982-2989
- 全文大小：404 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Industrial Chemistry and Chemical Engineering
Catalysis
Materials Science
Biotechnology - 出版者：Springer New York
- ISSN：1975-7220
- 卷排序：33
文摘
The selectivity of alkyl-substituted imidazolium cation-based ionic liquids (ILs) with different anion: Tf2N, PF6, Tf2N and BF4, namely 1-Butyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([BMIM][Tf2N]), 1-Butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]), 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([EMIM][Tf2N]), 1-Methyl-3-octyl imidazolium tetrafluoroborate ([OMIM][BF4]), was tested for the extraction of benzene, toluene and p-xylene(BTX) aromatics with hexane mixtures. Liquid-liquid equilibrium (LLE) data were determined for the six ternary mixtures {hexane (1)+BTX (2)+ILs (3)} at 298.15 K and atmospheric pressure. In addition, binary LLE data from 293.15 K to 318.15 K are also reported for the system {hexane (1)+[BMIM][Tf2N] (2)}. The ternary experimental LLE data were satisfactorily correlated with the NRTL activity coefficient model. The degree of consistency of the tie lines was estimated by using the Othmer-Tobias equation, for which a good linear correlation coefficient (R2) was obtained. As a result, the selectivity of ILs as potential solvents for the extraction of BTX from aliphatic components was found to be much higher than unity and PF6 anion showed higher selectivity compared to other anions.