Unexpectedly low results were obtained for extraction of chlorides, perchlorates, nitrates, and thiocyanates of alkalis, alkaline earths, and actinides from aqueous solutions by water-immiscible solutions of crown ethers. The expected preference for ions matching the crown ether hole-size was not seen here or in solubilizing dry alkali chlorides. Addition of an organic-soluble acid increased alkali extraction, with preference for the ion sized to fit the crown ether. Addition of an organic-soluble alcohol or phenol increased extraction of KCl. Alcohol system results indicated an adduct of one crown ether and one or two alcohol molecules per KCl.
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Oak Ridge National Lab., Tenn. (USA)
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Tennessee
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Unexpectedly low results were obtained for extraction of chlorides, perchlorates, nitrates, and thiocyanates of alkalis, alkaline earths, and actinides from aqueous solutions by water-immiscible solutions of crown ethers. The expected preference for ions matching the crown ether hole-size was not seen here or in solubilizing dry alkali chlorides. Addition of an organic-soluble acid increased alkali extraction, with preference for the ion sized to fit the crown ether. Addition of an organic-soluble alcohol or phenol increased extraction of KCl. Alcohol system results indicated an adduct of one crown ether and one or two alcohol molecules per KCl.
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McDowell, W. J. & Shoun, R. R.Evaluation of crown compounds in solvent extraction of metals,
article,
January 1, 1977;
Tennessee.
(https://digital.library.unt.edu/ark:/67531/metadc1449135/:
accessed July 16, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.
