N-(2-hydroxybenzoyl)-N'-(p-tosyl)hydrazine - reagent for concentrating non-ferrous metal ions

Abstract

The patterns of complex formation of N-(2-hydroxybenzoyl)-N'-(p-tosyl)hydrazine (HBSH) with Co(II) ions in an ammonia environment using the method of extraction spectrophotometry and in an alkaline environment in the “extractionreextraction” variant were studied. The absorption spectra of extracts of complexes of Co(II) ions and other non-ferrous metals (NM) with HBSH in an ammonia environment were recorded in order to determine the interfering influence of foreign components. The optimal conditions for the reaction of complexation of Co(II) ions with HBSH in ammonia and alkaline media were determined - the optimal pH range of complexation, extraction time, and the amount of reagent required for complete binding of Co(II) ions. The conditional stability constant of the complex of Co(II) ions with HBSH was determined using the Babko method. Under optimal complexation conditions, calibration graphs were constructed for the determination of Co(II) ions with HBSH; the molar light absorption coefficient was calculated. The accuracy and convergence of the spectrophotometric reaction were determined by the “input-found” method. The effect of Cu(II), Ni(II), Ag(II), Zn(II), Cd(II) ions on the complexation reaction of HBSH with Co(II) ions was studied using the additive method. The method of extraction-spectrophotometric determination of Co(II) ions with HBSH in an ammonia environment was tested on sulfide copper-nickel ore of the Murmansk region. To determine the possibility of practical use of reactions of complexation of Co(II) ions with HBSH in an alkaline medium, ion flotation was performed. The optimal conditions for the extraction of Co(II) ions were determined: flotation time, pH range, optimal amount of HBSH.