Effect of strong electrolytes on the physicochemical and thermodynamic properties of the complexion process of iron subgroup ions

Abstract

The stability constants of the Fe(II), Co(II), Ni(II) ion complexes with organic ligands (sodium dibutyldithiophosphate, potassium dibutyldithiophosphate, ammonium dibutyldithiophosphate) in the temperature range of 298–318 K at
different ion forces (I = 0.1–0.75 mole/l) were determined by pH-metry methods. According to the measured temperature
dependence of suitability constants on the basis of the thermodynamic functions for the formation of the iron subgroup ion complexes were determined with alkali metals and ammonium dibutyldithiophosphate. Impacts of strong electrolyte NaNO3 were
studied to the changes in enthalpy for the formation of the iron subgroup ion complexes with phosphate collectors. The effect of
an electrolyte NaNO3 has been studied on the physical and chemical properties of alkali metals and ammonium dialkyldithiophosphate complexes with iron subgroup ions. The metal-sulfur bonds formation scheme was showed for dibutyldithiophosphate
ion which has a high reactivity. The schemes of formation and transfer of the M(II) complex with dibutyldithiophosphate-ion
are given into the background electrolyte solution.