Process for the recovery of cobalt and nickel in the presence of magnesium from sulphate solutions by Cyanex 272 and Cyanex 302

Tsakiridis, PE; Agatzini-Leonardou, S

dc.contributor.author	Tsakiridis, PE	en
dc.contributor.author	Agatzini-Leonardou, S	en
dc.date.accessioned	2014-03-01T01:21:15Z
dc.date.available	2014-03-01T01:21:15Z
dc.date.issued	2004	en
dc.identifier.issn	0892-6875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16163
dc.subject	Hydrometallurgy	en
dc.subject	Solvent extraction	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Cobalt	en
dc.subject.other	Hydrometallurgy	en
dc.subject.other	Magnesium printing plates	en
dc.subject.other	Nickel	en
dc.subject.other	Solutions	en
dc.subject.other	Solvent extraction	en
dc.subject.other	Statistical methods	en
dc.subject.other	Sulfur	en
dc.subject.other	Cyanex 272	en
dc.subject.other	Cyanex 302	en
dc.subject.other	Stripping	en
dc.subject.other	Sulphate	en
dc.subject.other	Metal recovery	en
dc.title	Process for the recovery of cobalt and nickel in the presence of magnesium from sulphate solutions by Cyanex 272 and Cyanex 302	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2004.03.010	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2004.03.010	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The simultaneous extraction and separation of Co(II) and Mg(II) from nickel sulphate solutions was carried out using the phosphinic extractant Cyanex 272. Nickel, which remained in the aqueous phase, was concentrated by Cyanex 272 and then stripped by synthetic nickel spent electrolyte in order to produce a solution suitable for nickel electrowinning. Subsequently, cobalt and magnesium separation was achieved by the thiophosphinic acid Cyanex 302. Statistical design and analysis of experiments were used, in all cases, in order to determine the main effects and interactions of the solvent extraction factors, which were the extraction pH at equilibrium, the temperature, the extractant concentration and the organic to aqueous phase ratio. A statistically designed experiment was, also, carried out in order to study stripping of the loaded, with cobalt and magnesium, Cyanex 272 organic phase by diluted sulphuric acid. Cobalt was recovered from the loaded Cyanex 302 by a synthetic cobalt spent electrolyte, in order to produce a solution suitable for cobalt electrowinning. The slope analysis method was used to determine the nature of the cobalt and nickel complexes extracted by both extractants. The number of stages required for the extraction and stripping processes was also evaluated. Finally, the results of the continuous, counter-current, mini-plant tests clearly demonstrated the feasibility of the simultaneous recovery of cobalt and magnesium from nickel sulphate solutions by Cyanex 272, as well as their separation by Cyanex 302. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2004.03.010	en
dc.identifier.isi	ISI:000222442600008	en
dc.identifier.volume	17	en
dc.identifier.issue	7-8	en
dc.identifier.spage	913	en
dc.identifier.epage	923	en