Extraction of alkali halides from their aqueous solutions by crown ethers

Y. Marcus*, L. E. Asher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

Potassium and sodium halides can be extracted from their aqueous solutions by dibenzo-18-crown-6 and dicyclohexo-18-crown-6 dissolved in protic solvents, which solvate the anions effectively. Both separate ions and ion pairs are extracted, the order of extractability among the halides being fluoride > iodide > bromide > chloride, apparently reflecting the solvation of the anions. The solubility of the crown ethers in a series of solvents are correlated with the solvent properties. The results are summarized in a prescription for selecting the best crown ether/solvent combination for effective extraction of the alkali halides.

Original languageEnglish
Pages (from-to)1246-1254
Number of pages9
JournalJournal of Physical Chemistry
Volume82
Issue number11
DOIs
StatePublished - 1978

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