Solvent extraction of copper by hydroxy oximes

Extraction kinetics of copper with hydroxyoxime extractant.

“…(3) and (4). The inter facial area per molecule of the oxime, anti HNBPO, is estimated as 95 A2 for «-heptane7) and 123 A2 for toluene diluent1}, and their ratio is as small as 1.3.…”

Extraction kinetics of nickel with a hydroxyoxime extractant.

“…Nickel, as well as copper and palladium, is extracted into the organic phase with hydroxyoximes as a square planar chelate according to the extraction reaction described by Ni2+ +2HR^=± NiR2 +2H+ (4) where the extraction equilibrium constant with HNAPOwas evaluated as Ke=3.2x\0~5 in the previous study. 5) According to the inter facial reaction scheme proposed by Komasawaet al (10) For the description of 6NiR+ as a function of the concentrations of the reactant species, three kinds of species should be taken into consideration as the adsorbed species: monomeric HNAPO, the intermediate complex and the final chelate.…”

Behavior of interfacial tension during copper extraction by LIX65N.

“…Since Flett et al 3) investigated copper extraction by LIX65N, many investigations of this extraction system have been carried out.4) Inoue and Nakashio pointed out in their review4) that there are two different interpretations of copper extraction by LIX65N in the literature.…”