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Extraction of Phenol and Chlorophenols Using Ionic Liquid [Bmim]+[BF4]− Dissolved in Tributyl Phosphate.
- Source :
- CLEAN: Soil, Air, Water; Apr2013, Vol. 41 Issue 4, p349-355, 7p
- Publication Year :
- 2013
-
Abstract
- In the present work, experiments have been carried out with a focus to reduce the volume requirement of solvent by mixing with imidazolium based ionic liquids (ILs) for the solvent extraction of phenol, p-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, and pentachlorophenol from aqueous solutions. The effect of aqueous phase pH (2-12), agitation speed (100-450 rpm), solute concentration in feed (2-50 mg/L), temperature (303-333 K), treat ratio (1-11), and 1-butyl-3-methyl imidazolium tetrafluoroborate [Bmim]<superscript>+</superscript>[BF<subscript>4</subscript>]<superscript>−</superscript> volume in tributyl phosphate (TBP; 0-0.7% v/v) on extraction of phenols has been studied and optimized. Parameters like strip phase pH (3-13) and stripping agent concentration (0.001-0.009 N) have also been studied for stripping of phenols from solvent phase. It has been found that 0.5% v/v of ionic liquid [Bmim]<superscript>+</superscript>[BF<subscript>4</subscript>]<superscript>−</superscript> in solvent TBP extracts more than 97.5% of phenol and chlorophenols from aqueous solutions with a treat ratio (aqueous to solvent phase ratio) of 5. Transport mechanism for extraction and stripping of phenol and chlorophenols using ionic liquid [Bmim]<superscript>+</superscript>[BF<subscript>4</subscript>]<superscript>−</superscript> has been discussed. The results show that by appropriate selection of extraction and stripping conditions, it is possible to remove nearly all phenols with a treat ratio of 5. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18630650
- Volume :
- 41
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- CLEAN: Soil, Air, Water
- Publication Type :
- Academic Journal
- Accession number :
- 86659013
- Full Text :
- https://doi.org/10.1002/clen.201100632