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 language | English |
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Pages (from-to) | 1246-1254 |
Number of pages | 9 |
Journal | Journal of Physical Chemistry |
Volume | 82 |
Issue number | 11 |
DOIs | |
State | Published - 1978 |