Compositions containing n-ethyl hydroxamic acid chelants
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United States of America Patent
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Dec 29, 1992
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Jul 19, 1991
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Jul 19, 1991
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Abstract
N-ethyl hydroxamic acids, preferably containing at least 10 carbon atoms, useful as metal chelants for use in organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted metal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentrations into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhibit rapid phase separation from aqueous solutions and resistance to forming emulsions.
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