Metal Ion Extraction in the Ammonium Sulfate–Ethoxylated Nonylphenol–Water System in the Presence of Organic Complexing Agents

Phase equilibria in the ammonium sulfate–oxyethylated nonylphenol (neonol AF 9-10)–water system at 25°C have been studied by the isothermal titration and isothermal section methods. Optimum extraction parameters (neonol AF 9-10 : ammonium sulfate ratio of 1 : 3, weight fraction of water of 75.0 wt %) have been determined; the patterns of distribution of iron(III), copper(II), aluminum, and indium ions in the ammonium sulfate–neonol AF 9-10–water system in the presence of acetylacetone and 1,2,3-benzotriazole have been found. Conditions for the quantitative extraction of aluminum and copper(II) from ammonia media have been found. Conditions for the separation of copper(II) and iron(III) from zinc, cobalt(II), and indium in a neutral medium, copper(II) from zinc and cobalt(II) at an ammonia content of 0.05–0.06 mol/L in the presence of acetylacetone, and nickel from cobalt(II) and iron(III) at a sulfuric acid content of 0.1–0.5 mol/L in the presence of 1,2,3-benzotriazole have been determined.