Room temperature ionic liquids as novel media for ‘clean’ liquid–liquid extraction

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Jonathan G. Huddleston, Heather D. Willauer, Richard P. Swatloski, Ann E. Visser and Robin D. Rogers


Abstract

The partitioning of simple, substituted-benzene derivatives between water and the room temperature ionic liquid, butylmethylimidazolium hexafluorophosphate, is based on the solutes’ charged state or relative hydrophobicity; room temperature ionic liquids thus may be suitable candidates for replacement of volatile organic solvents in liquid–liquid extraction processes.


References

  1. T. C. Lo, in Handbook of Separations Techniques for Chemical Engineers, ed. P. A. Schwietzer, McGraw-Hill, New York, 1996, pp. 1-450–1-529 Search PubMed .
  2. J. Rydberg, C. Musikas and G. R. Choppin, Principles and Practices of Solvent Extraction, Marcel Dekker, New York, 1992 Search PubMed .
  3. K. R. Seddon, J. Chem. Technol. Biotechnol., 1997, 68, 351 CrossRef CAS .
  4. Y. Chauvin and H. Olivier-Bourbigou, CHEMTECH, 1995, 25, 26 CAS .
  5. C. L. Hussey, Pure Appl. Chem., 1988, 60, 1763 CrossRef CAS .
  6. V. R. Koch, C. Nanjundiah and R. T. Carlin, US Pat. 95-497310 950630 Search PubMed .
  7. J. S. Wilkes and M. J. Zaworotko, J. Chem. Soc., Chem. Commun., 1992, 965 RSC .
  8. J. Fuller, R. T. Carlin, H. C. De Long and D. Haworth, J. Chem. Soc., Chem. Commun., 1994, 299 RSC .
  9. J. S. Wilkes, J. A. Levisky, R. A. Wilson and C. L. Hussey, Inorg. Chem., 1982, 21, 1263 CrossRef CAS .
  10. C. Hansch, A. Leo and D. Hoekman, Exploring QSAR Hydrophobic, Electronic and Steric Constants, American Chemical Society, Washington, DC, 1995 Search PubMed .
  11. D. E. Leahy, J. J. Morris, P. J. Taylor and A. R. Wait, J. Chem. Soc., Perkin Trans. 2, 1992, 723 RSC .
  12. D. E. Leahy, J. J. Morris, P. J. Taylor and A. R. Wait, J. Chem. Soc., Perkin Trans. 2, 1992, 705 RSC .
  13. J. G. Huddleston, S. T. Griffin, J. Zhang, H. D. Willauer and R. D. Rogers, in Aqueous Two-Phase Systems, ed. R. Kaul in Methods in Biotechnology, ed. J. M. Walker, Humana Press, Totowa, NJ, 1998, in press Search PubMed .