Extraction of sodium chloride from water and solubility of water in hydrophobic trialkylammonium alkanoate-based ionic liquids

Camiel H.C. Janssen, Maaike C. Kroon, Sybrand J. Metz, Jaap Van Spronsen, Geert-Jan Witkamp*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The sodium chloride extraction from aqueous solutions by using hydrophobic trialkylammonium alkanoate ionic liquids (ILs) is studied experimentally. The water solubility in these ILs is also determined. It is found that trialkylammonium alkanoate ILs show sodium chloride extraction efficiencies up to 0.101 g NaCl extracted/g NaCl start. This efficiency cannot be explained by the low water uptake (up to 0.02 gwater/gIL) in the IL. Instead, the sodium chloride extraction must be attributed to other factors, such as steric hindrance considerations. Steric hindrance considerations also explain the dependence of sodium chloride extraction efficiency on the IL structure. Kinetic experiments were performed to ensure a state of chemical equilibrium.

Original languageEnglish (US)
Pages (from-to)3391-3394
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume55
Issue number9
DOIs
StatePublished - Sep 9 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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