AMIDES OF ACIDS OF PHOSPHORUS FOR THE EXTRACTION OF METALS

摘要

Compounds of formula (I), wherein R<1> is an optionally substituted 2-alkylphenoxy group, each of R<2>, R<3> and R<4> 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 R<1> and R<2> is 2-isopropyl-4-tert-nonylphenoxy and each of R<3> and R<4> is phenyl and the compound wherein R<1> is 2-methyl-4-tert-nonylphenoxy, R<2> is 2,4-dimethylphenoxy and each of R<3> and R<4> is phenyl. Compounds of formula (I) are useful for the solvent extraction of metals, especially zinc from aqueous solution.