Efficient formulations used in hydrometallurgy are often based on synergistic action of two oil-soluble extractants at an optimized mole fraction. In this series papers, we describe the N,N’-dimethyl-N,N’-dioctylhexylethoxymalonamide (DMDOHEMA)/di(2-ethylexyl) phosphoric acid (HDEHP) system, and how expression effect varies with acidity, using three common representations: distribution ratios, ...
