LAPSE:2018.0257
Published Article
LAPSE:2018.0257
Distribution of N-Methylimidazole in Ionic Liquids/Organic Solvents Systems
Milen G. Bogdanov, Ivan Svinyarov
July 31, 2018
The partition coefficients, Kmim, of N-methylimidazole (mim) in two-component systems composed of ionic liquid (IL) and a series of organic solvents immiscible with ILs (butyl acetate, ethyl acetate, tert-butyl methyl ether, diethyl ether and cyclohexane) were determined by a shake-flask method. The influence of different factors such as temperature, solvent polarity, mim concentration, and water content on Kmim by using 1-butyl-3-methylimidazolium chloride {[C₄C₁im]Cl} as a model compound was comprehensively studied. The calculated thermodynamic functions of transfer (∆trG⁰, ∆trH⁰, ∆trS⁰) showed that the mim migration (IL→organic phase) is a thermodynamically unfavorable and enthalpy-determined process in the temperature range of 298.15 to 328.15K; however, the results suggested that mim partition toward the organic phase can be enhanced by the rational manipulation of the extraction conditions. Experiments conducted with other 1-alkyl-3-methylimidazolim chlorides (CnC₁im]Cl (n = 6, 8, 10) revealed that mim possesses similar behavior and can be successfully washed out from the ILs by extraction with organic solvents. The results obtained in this study give some clues toward the choice of an appropriate solvent and conditions to be employed for the purification of halide-based ILs by means of a liquid-liquid extraction.
Keywords
interactions, ionic liquids, liquid-liquid extraction, N-methylimidazole, partition coefficient, separation, transfer
Subject
Suggested Citation
Bogdanov MG, Svinyarov I. Distribution of N-Methylimidazole in Ionic Liquids/Organic Solvents Systems. (2018). LAPSE:2018.0257
Author Affiliations
Bogdanov MG: Faculty of Chemistry and Pharmacy, Sofia University St.Kl. Ohridski, 1 J. Bourchierblvd., 1164 Sofia, Bulgaria
Svinyarov I: Faculty of Chemistry and Pharmacy, Sofia University St.Kl. Ohridski, 1 J. Bourchierblvd., 1164 Sofia, Bulgaria
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Journal Name
Processes
Volume
5
Issue
4
Article Number
E52
Year
2017
Publication Date
2017-09-22
Published Version
ISSN
2227-9717
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PII: pr5040052, Publication Type: Journal Article
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LAPSE:2018.0257
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doi:10.3390/pr5040052
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Jul 31, 2018
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