Amides of acids of phosphorus for the extraction of metals

C - Chemistry – Metallurgy – 07 – F

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C07F 9/24 (2006.01) C07F 9/36 (2006.01) C07F 9/44 (2006.01) C22B 3/38 (2006.01) C22B 19/20 (2006.01)

Patent

CA 2177064

Compounds of formula (I), wherein R1 is an optionally substituted 2- alkylphenoxy group, each of R2, R3 and R4 is a group selected from optionally substituted 2-alkylphenoxy, optionally substituted phenyl, optionally substituted alkyl and optionally substituted alkoxy and at least one optionally substituted 2-alkylphenoxy group has a tertiary alkyl substituent except the compound wherein each of R1 and R2 is 2-isopropyl-4-<u>tert</u>- nonylphenoxy and each of R3 and R4 is phenyl and the compound wherein R1 is 2- methyl-4-<u>tert</u>-nonylphenoxy, R2 is 2,4-dimethylphenoxy and each of R3 and R4 is phenyl. Compounds of formula (I) are useful for the solvent extraction of metals, especially zinc from aqueous solution.

Composés selon la formule (I), dans laquelle R?1¿ est un groupe 2-alkylphénoxy éventuellement substitué, R?2¿, R?3¿ et R?4¿ sont chacun un groupe sélectionné parmi: 2-alkylphénoxy éventuellement substitué, phényle éventuellement substitué, alcoyle éventuellement substitué et alcoxy éventuellement substitué, et au moins un groupe 2-alkylphénoxy éventuellement substitué possède un alcoyle tertiaire comme substituant, sauf le composé dans lequel R?1¿ et R?2¿ sont chacun du 2-isopropyl-4-<u>tert</u>-nonylphénoxy et R?3¿ et R?4¿ sont chacun du phényle et le composé dans lequel R?1¿ est du 2-méthyl-4-<u>tert</u>-nonylphénoxy, R?2¿ est du 2,4-diméthylphénoxy et R?3¿ et R?4¿ sont chacun du phényle. Les composés selon la formule (I) sont utiles pour l'extraction par solvant de métaux, en particulier pour extraire du zinc de solutions aqueuses.

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