Solvent Extraction of Some Metal Ions with Alkylcarbonyl- Substituted N-Phenylhydroxylamines

Abstract

N-Phenylhydroxylamines (HL) with an alkylcarbonyl group containing 3 to 10 carbon atoms were synthesized and used for the extraction of several divalent metal ions from an aqueous solution to carbon tetrachloride. The distribution constants, K_D, of these chelating reagents increased with an increase in the carbon number in the alkylcarbonyl group. The increment of the logarithmic distribution constant, logK_D, was about 0.5 per carbon atom in the alkylcarbonyl group. Extracted species CuL₂, CoL₂, PbL₂, NiL₂HL and ZnL₂HL were found for extraction with N-hexanoyl- and N-octanoyl-N-phenylhydroxylamines. The extraction constants for these chelates were evaluated.