Separation of gold(III) from hydrochloric acid solution containing platinum(IV) and palladium(II) by solvent extraction with Cyanex 272 and LIX 63

摘要

Solvent extraction experiments were performed to separate Au(III), Pt(IV) and Pd(II) in the HCI concentration ranged from 0.5 to 9 M. Cyanex 272 extracted only Au(III) among the three metals, while both Au(III) and Pd(II) was extracted by LIX 63 in the experimental ranges. The Au(III) in the loaded Cyanex 272 and LIX63 was stripped by either (NH4)(2)S2O3 or (NH2)(2)CS. The concentration ratio of Au(111) to Pd(II) affected the extraction behavior of Au(III) and Pd(II) by LIX 63. The characteristic vibration bands of Cyanex 272 and LIX 63 were proposed by analyzing the FT-IR. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.