Solvent extraction of base metals by mixtures of organophosphoric acids and non-chelating oximes

Add time:08/14/2019    Source:sciencedirect.com

The effect of non-chelating oximes on the extraction of several transition and nontransition metals by solutions of organophosphoric acids (H2A2) in xylene has been investigated. Synergistic enhancements of extraction of divalent transition metal ions were found with the oximes of aliphatic aldehydes, the enhancements of extraction increasing in the order VO2+ < Mn2+ < Mn2+ < Co2+ < Cu2+ < V2+ < Ni2+. Large synergistic effects were also found for copper(I) and silver(I). Among the divalent non-transition metals studied (Mg, Ca, Zn, Cd, Sn, and Pb), only cadmium showed a synergistic effect. No significant synergism was found for any of the trivalent metal ions studied (Fe, Cr, V, Al, Bi, La, Ce, and Nd). The extracted complexes of copper, cobalt, and nickel were shown to be octahedral in structure, with the compositions Cu(HA2)2(oxime)2, Co(HA2)2(oxime)2, and NiA(HA2)(oxime)3, respectively, in which HA2− acts as a bidentate ligand. Extraction rates were found to be rapid, even for nickel, and complete stripping of metal-loaded organic phases was effected by contact with 0.5 M mineral acid. Some practical applications, such as the recovery of nickel from acidic leach liquors, are envisaged.

We also recommend Trading Suppliers and Manufacturers of 2,4-dimethylpentan-3-one oxime (cas 1113-74-2). Pls Click Website Link as below: cas 1113-74-2 suppliers

Prev:Optically active isoxazolidines and 1,3-amino alcohols by asymmetric selenocyclization reactions of O-allyl oximes
Next:Original articleCesium cation templated selective synthesis of a “cone-shaped” sugar macrotricyclic cryptand: A dual anion-cation molecular recognition of potassium tartrateSynthèse sélective assistée par matrice de cations Césium d’un nouveau cryptant macrotricyclique : double reconnaissance cation-anion du tartrate de potassium)