Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 53, Issue 51, Pages 20024-20031Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie503432n
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Funding
- National Natural Science Foundation of China [21307028, 31372214]
- Basic and Cutting Edge Technology Research Projects of Henan Province [132300410293, 122300410004]
- Young Backbone Teachers in Colleges and Universities of Henan Province [2013GGJS]
- Science and Technology Research Foundation Projects of Henan Province [142102210049]
- Natural Science Foundation of the Education Department of Henan Province [14B150026]
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A series of hydroxyl-, benzyl-, and dialkyl-functionalized ionic liquids (ILs) were synthesized, and their extraction abilities for phenol, resorcinol, sigma-nitrophenol, guaiacol, and o-cresol were investigated. Results showed that the extraction efficiencies of the five phenols were significantly influenced by the pH values, salt added, phase ratio, and chemical structure of the IL. Phenols present in nonionized forms were preferable to transfer into IL phases. The anion/cation hydrogen-bonding characters of ILs were the main structural factors affecting the extraction efficiency, which also increased with increased hydrophobicity of phenols. These results are promising for the liquidliquid extraction and enrichment of phenols in separation science and related industrial processes.
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