ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly

Extraction and separation of Cd(II) and Ni(II) with salts of Cyanex 301 and amines

V. I. Kuzmin, M. N. Leskiv, N. V. Gudkova, and D. V. Kuzmin

Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russia



Received: 1 June 2020  Accepted: 22 September 2020


The extraction of cadmium from sulfuric acid solutions and its separation from nickel with salts of bis(2,4,4-trimethylpentyl)dithiophosphinic acid (Cyanex 301) and amines was studied. The data obtained show that extractants based on Cyanex 301 and Quaternary ammonium bases are most suitable for this since it is possible to extract cadmium in the form of sulfates and bisulfates as well as stripping metal from the organic phase. For deep extraction of cadmium from sulfate solutions in this system, 1–2 stages of extraction are sufficient. At this stage, the separation coefficient of cadmium and nickel βCd/Ni reaches values > 106, and the distribution coefficient of cadmium reaches almost 104. Cadmium stripping is achieved by treating the organic phase with an ammonia solution containing ammonia more than 4 mol/L. The process can be used in the processing of cadmium–nickel batteries.

Keywords: Nickel–cadmium separation; Solvent extraction; Cyanex 301; Amines

Full paper is available at

DOI: 10.1007/s11696-020-01373-1


Chemical Papers 75 (3) 1115–1121 (2021)

Sunday, June 16, 2024

SCImago Journal Rank 2021
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers