Liquid-liquid extraction separation of iron(III) from titania wastes usingTBP-MIBK mixed solvent system

The extraction of iron(III) from hydrochloric acid solutions has been inves tigated using a mixed solvent system consisting of tributyl phosphate (TBP) and methyl isobutyl ketone (MIBK). The results demonstrate that iron(III) is extracted as HFeCl4 with 2 mol of the solvent. Extraction and stripping isotherms were obtained using the solvent mixture consisting of 70 vol.% TB P and 30 vol.% MIBK with a typical solution containing 1 M of iron(IU) and 2 M of hydrochloric acid. The potential of the mixed solvent system for the recovery of high purity iron(III) chloride from waste chloride liquors of titanium minerals processing industry has been assessed. (C) 2001 Elsevier Science B.V. All rights reserved.