Liquid–liquid extraction of thiocyanate and thiocyanatoferrate(III) complexes with tris(3,5,5-trimethylhexyl)amine
Abstract
The distribution ratio of iron(III) at initial concentration 10–4M has been measured using aqueous solutions of potassium nitrate and thiocyanate, at pH 2, with ionic strengths 0·25 and 0·50M, and an organic phase of tris(3,5,5-trimethylhexyl)amine in benzene. Concentrations of thiocyanate and of the amine were varied. An extraction equation was derived and found to be in good agreement with the results up to a thiocyanate concentration of 0·025M. Values of extraction equilibrium constants were calculated in several ways.