N-ethyl hydroxamic acid chelants

Details N-ethyl hydroxamic acid chelants N-ethyl hydroxamic acid chelants

C - Chemistry, Metallurgy

07

C

C07C 259/06 (2006.01) C22B 3/26 (2006.01) C22B 3/32 (2006.01)

Patent

CA 2113650

N-ethyl alkanohydroxamic acids, where said alkyl group is a straight chain alkyl group of 8 to 10 carbon atoms, or a branched alkyl group of 8 to 18 carbon atoms, provided said alkyl group is not cyclic, useful as metal chelants for use an organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted me- tal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentra- tions into lower strength acid stripping agents. The N-ethyl hydroxamic acid- containing organic solvent extraction solutions exhi- bit rapid phase separation from aqueous solutions, good hydrolytic stability and resistance to forming emulsions.

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