Efficient Extraction of [Bmim]BF4 by Organic-Aqueous System of NaBr-H2O and CH2Cl2

被引：0
|
作者：
Wu, Yingqiu [1 ,2 ,4 ]
Wang, Daoguang [1 ,2 ]
Zou, Shengwang [1 ,2 ,4 ]
Wang, Junfeng [1 ,2 ]
Chen, Shangqing [3 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Mesosci & Engn, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
[3] Wuhan Inst Technol, Sch Chem Engn & Pharm, Key Lab Green Chem Engn Proc, Minist Educ, Wuhan 430205, Peoples R China
[4] China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
来源：
JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2024年 / 69卷 / 12期
基金：
中国国家自然科学基金;
关键词：
IONIC LIQUIDS; INORGANIC SALTS; SEPARATION; WATER;
D O I：
10.1021/acs.jced.4c00434
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The homogeneous [Bmim]BF4-NaBr-H2O system will be obtained in the industrial synthesis of [Bmim]BF4, and the extraction of [Bmim]BF4 from such a system remains to be challenging. In this work, dichloromethane (CH2Cl2), is used as the organic phase to extract and separate [Bmim]BF4 (1-butyl-3-methylimidazolium tetrafluoroborate) from the reaction solution. Dichloromethane, serving as the extracting agent, effectively facilitates the purification and component separation of the ionic liquid [Bmim]BF4 postreaction, enhancing the reaction efficiency and product purity. The influence of operating parameters, including initial concentration of the ionic liquid (IL), temperature, O/A ratio (the volume ratio of organic phase to aqueous phase), and initial concentration of NaBr, on IL separation and extraction were investigated. It was found that the recovery ratio of IL and the separation factor could reach 90.3% and 133.19 at optimized extraction conditions. Moreover, this method was appropriate for the extraction of [Bmim]BF4 at different concentrations. As a result, this work developed an optimized extraction scheme to maximize the yield of [Bmim]BF4 using an organic and aqueous two-phase system of NaBr-H2O and CH2Cl2, which could provide essential technological parameters for the efficient extraction of [Bmim]BF4 in the NaBr-H2O-CH2Cl2 two-phase system.
引用
收藏
页码：4438 / 4444
页数：7
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