Versatic Acid 10のCu塩によるFe<SUP>3+</SUP>の抽出分離

Abstract

The iron removal from a leach solution is one of the fundamental purification processes and it must be contained inevitably in many hydrometallurgical processes. However, some difficulties are experienced when other heavy metal ions co-exist.This paper is concerned with the applicability of the solvent exchange extraction method (SEXM) for the selective extraction of Fe3+ from the aqueous solution containing Fe3+, Cu2+, Pb2+ and Zn2+ with Cu-salt of Versatic Acid 10.Resalts obtained are as follows:(1) Ferric ions can be effectively removed from solutions containing Fe3+, Cu2+, Pb2+ and Zn2+ by using SEXM with Cu-salt of Versatic Acid 10 as an extractant.(2) The amount of Cu-salt of Versatic Acid 10 required for a complete removal of Fe3+ is greatly affected by initial pH and Fe3+ concentration of aqueous solutions.(3) The addition of excess amount of Cu-salt of Versatic Acid 10 causes the remaining of Cu2+ and the extraction of Pb2+ in an organic phase.(4) The stripping rate of Fe3+ from an organic phase is very slow compared with that of Cu2+, and thus the improvement of a stripping rate of Fe3+ may be extremely important in the application of this method to industrial processes.