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http://dx.doi.org/10.9713/kcer.2014.52.5.627

Extraction Equilibrium of Acrylic Acid by Aqueous Two-Phase Systems Using Hydrophilic Ionic Liquids  

Lee, Yong Hwa (Department of Chemical and Biological Engineering, Korea National University of Transportation)
Lee, Woo Youn (Department of Chemical and Biological Engineering, Korea National University of Transportation)
Kim, Ki-Sub (Department of Chemical and Biological Engineering, Korea National University of Transportation)
Hong, Yeon Ki (Department of Chemical and Biological Engineering, Korea National University of Transportation)
Publication Information
Korean Chemical Engineering Research / v.52, no.5, 2014 , pp. 627-631 More about this Journal
Abstract
As an effective method for extraction of acrylic acid, aqueous two-phase systems based on morpholinium ionic liquids were used in this study. Effects of the alkyl chain length of cation in morpholinium ionic liquids on phase diagram and extraction efficiencies were investigated. Experimental results show that aqueous two phase systems can be formed by adding appropriate amount of morpholinium ionic liquids to aqueous $K_2HPO_4$ solutions. It can be found that the ability of morpholinium ionic liquids for phase separation followed the order [HMMor][Br]>[OMMor][Br]>[BMMor][Br]>[EMMor][Br]. There was little difference between binodal curves of imidazolium ionic liquids and those of morpholinium ionic liquids. 50~90% of the extraction efficiency was observed for acrylic acid by aqueous two phase extraction of acrylic acid with morpholinium ionic liquids. It can be concluded that morpholinium ionic liquids/$K_2HPO_4$ were effective for aqueous two phases extraction of acrylic acid comparing to imidazolium ionic liquids/$K_2HPO_4$ systems because of their lower cost.
Keywords
Ionic Liquids; Morpholinium; Aqueous Two-phases; Binodal Curve; Acrylic Acid;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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