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Recovery of methacrylic acid from dilute aqueous solutions by ionic liquids though hydrogen bonding interaction
Bai, Yinge1,2; Yan, Ruiyi1; Huo, Feng1; Qian, Jianguo1,2; Zhang, Xiangping1; Zhang, Suojiang1

The recovery of carboxylic acids from dilute aqueous solution is necessary but difficult in chemical industry. Methacrylic acid (MAA) is an important chemical widely used in polymer industry. In this work, the recovery of carboxylic acid from diluted aqueous solution by liquid-liquid extraction using ionic liquids (ILs) as extractants was studied. MAA was employed as model carboxylic acid. The partition coefficients of MAA in biphasic system and the extraction efficiencies of MAA were determined for imidazolium-based ILs and quaternary ammonium salt ILs with different structure of cation and anion. The extraction conditions such as extraction time, extraction temperature, mass ratio of ILs to MAA aqueous solution, initial concentrations of MAA, and water content were evaluated. An internal mechanism of the MAA extract by ILs was revealed by combining solvatochromic study, FT-IR and quantum chemical calculations. The results show that the strong hydrogen bond basicity (beta) of ILs results in the high partition coefficient of MAA, which provides guidance to molecular design of ILs for the high efficient extractive separation of MAA from diluted aqueous solution. Based on this, IL with strong hydrogen bond basicity ([N-8881]Cl) was used to extract MAA from dilute aqueous solution. Compared with hexane which is conventional solvent used in MAA extractive separation, [N-8881]Cl can get 49 times higher of partition coefficient value and the extraction efficiency reach 94.57% for the single-stage extraction. (c) 2017 Elsevier B.V. All rights reserved.

KeywordExtraction Methacrylic Acid Ionic Liquids Extractive Mechanism Hydrogen Bond
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordSupercritical Carbon-dioxide ; Reactive Extraction ; Propionic-acid ; Phenolic-compounds ; Acetic-acid ; Separation ; Temperature ; Mixtures ; Solvents ; System
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Key Projects for Fundamental Research and Development of China(2016YFB0601303) ; National Science Foundation of China(21406244) ; National Natural Science Fund(21425625) ; Chinese Academy of Sciences(XDA07070600) ; NSFC-Guangdong Joint Fund
WOS IDWOS:000403730500038
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Key Lab Green Proc & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Bai, Yinge,Yan, Ruiyi,Huo, Feng,et al. Recovery of methacrylic acid from dilute aqueous solutions by ionic liquids though hydrogen bonding interaction[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2017,184:354-364.
APA Bai, Yinge,Yan, Ruiyi,Huo, Feng,Qian, Jianguo,Zhang, Xiangping,&Zhang, Suojiang.(2017).Recovery of methacrylic acid from dilute aqueous solutions by ionic liquids though hydrogen bonding interaction.SEPARATION AND PURIFICATION TECHNOLOGY,184,354-364.
MLA Bai, Yinge,et al."Recovery of methacrylic acid from dilute aqueous solutions by ionic liquids though hydrogen bonding interaction".SEPARATION AND PURIFICATION TECHNOLOGY 184(2017):354-364.
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