Extraction of bisphenol F three isomers from water with 1‐octyl‐3‐methylimidazolium tetrafluoroborate ionic liquid
Extraction of bisphenol F three isomers from water with 1‐octyl‐3‐methylimidazolium tetrafluoroborate ionic liquid
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DOI：
10.1002/cjce.22698
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发表时间：
2017-03
影响因子：
2.1
通讯作者：
L. Pan;Lifang Pan;Tiantian Wang;Zhi Wang;Zhimin Wu;Yongfei Li;Cuncun Zuo;Yuejin Liu
中科院分区：
文献类型：
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作者：
L. Pan;Lifang Pan;Tiantian Wang;Zhi Wang;Zhimin Wu;Yongfei Li;Cuncun Zuo;Yuejin Liu
研究了疏水性离子液体/水两相萃取体系对双酚F三种异构体的萃取行为。考察了离子液体结构、相比、温度、pH值和NaCl浓度等因素对萃取BPF 3种异构体的影响，以1-辛基-3-甲基咪唑四氟硼酸盐（[Omim][BF 4]）为萃取剂，萃取效率达99.0%以上。通过1H-NMR谱和密度泛函理论（DFT）证明了[Omim][BF 4]与BPF三种异构体之间氢键相互作用的萃取机理。从1H-NMR谱可以发现，加入[Omim][BF 4]后，BPF异构体的羟基质子立即消失，这表明BPF异构体与[Omim][BF 4]之间存在氢键相互作用。通过计算机模拟，氢键强度的大小顺序为2，2 '-BPF > 2，4'-BPF > 4，4 '-BPF，这与实验得到的分配系数的大小顺序一致。这些研究结果对相关工业过程中酚类物质的液-液萃取和富集具有重要意义。本文受版权保护。版权所有
The extraction for three isomers of bisphenol F (BPF) was studied in a hydrophobic ionic liquid/water biphasic extraction system. The influences of some factors, such as ionic liquid structure, phase ratio, temperature, pH value and NaCl concentration, on the extraction of BPF three isomers were investigated, and excellent efficiency with more than 99.0% extraction efficiency was obtained using 1-octyl-3-methylimidazolium tetrafluoroborate ([Omim][BF4]) as extractant. The extraction mechanism of the hydrogen bonds interaction between [Omim][BF4] and BPF three isomers were proved by 1H-NMR spectrum and the density functional theory (DFT). From 1H-NMR spectrum, it could be found that the immediate disappearance of the BPF isomer hydroxyl protons upon addition of [Omim][BF4], which indicated the existence of hydrogen bond interaction between BPF isomer and [Omim][BF4]. Through the computer simulation, the hydrogen bonds strength decreased in the order of 2,2'-BPF > 2,4'-BPF > 4,4'-BPF, which are consistent with the descending order of distribution coefficients obtained through the experiments. These results are promising for the liquid-liquid extraction and enrichment of phenols in related industrial processes. This article is protected by copyright. All rights reserved