Elsevier

Analytica Chimica Acta

Volume 257, Issue 1, 10 February 1992, Pages 105-108
Analytica Chimica Acta

Liquid-liquid extraction of alkaline earth and alkali metal ions with acylpyrazolones

https://doi.org/10.1016/0003-2670(92)80156-2Get rights and content

Abstract

The extraction of calcium, magnesium and lithium with 1-phenyl-3-methyl-4-stearoylpyrazol-5-one and with 1-phenyl-3-methyl-4-lauroylpyrazol-5-one was studied and separation factors were determined. A good separation of alkaline earth metal ions from lithium chloride can be achieved. 1-Phenyl-3-methyl-4-benzoylpyrazol-5-one in the presence of trioctylphosphine oxide is also suitable as an extractant for lithium whereas other alkali metals are extracted to only a minor extent. The distribution constant of this ligand was obtained for the investigated system. From the extraction data, stability constants of the formed complexes were determined.

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