Separation of Ni and Co from Mn, Mg and Ca in sulphate laterite leach solutions

E. Legault-Seguin, A. M. Alfantazi, V. Dresler

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


The current industrial practice in the processing of nickeliferous latentes involves the precipitation and releaching of Ni and Co to allow separation from the major impurities of Mn, Mg and Ca. A direct solvent extraction process has significant advantages over this practice, which suffers from difficult and costly precipitation steps, lower recovery and inherently complex flowsheets. The present investigation involves the examination of Cyanex 272, Cyanex 301 and Cyanex 302 as extractants for the direct extraction of Ni and Co from major impurities associated with laterite leaching, i.e. Mn, Mg and Ca. For Co extraction, Cyanex 301 and Cyanex 302 are superior to Cyanex 272, because they are able to selectively separate Co from Mn, Mg and Ca. Cyanex 272 offers complete extraction of Co from Ni and Ca, but Mn and Mg pose difficulty. Ni can only be extracted selectively with Cyanex 301, thus another extractant selective for Ni, such as Versatic 10 or Cyanex 301, is needed to recover Ni if Cyanex 302 or Cyanex 272 is used for the initial extraction.

Original languageBritish English
Title of host publicationInternational Laterite Nickel Symposium - 2004
EditorsW.P. Imrie, D.M. Lane
Number of pages7
StatePublished - 2004
EventInternational Laterite Nickel Symposium - 2004 - Charlotte, NC, United States
Duration: 14 Mar 200418 Mar 2004

Publication series

NameInternational Laterite Nickel Symposium


ConferenceInternational Laterite Nickel Symposium - 2004
Country/TerritoryUnited States
CityCharlotte, NC


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