Process for the recovery of cobalt and nickel in the presence of magnesium and calcium from sulphate solutions by Versatic 10 and Cyanex 272

Tsakiridis, PE; Agatzini, SL

dc.contributor.author	Tsakiridis, PE	en
dc.contributor.author	Agatzini, SL	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/123456789/16162
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	Electrolysis	en
dc.subject.other	Electrolytes	en
dc.subject.other	Hydrometallurgy	en
dc.subject.other	Nickel	en
dc.subject.other	pH effects	en
dc.subject.other	Solvent extraction	en
dc.subject.other	Statistical methods	en
dc.subject.other	Stripping process	en
dc.subject.other	Synthetic sulfate solutions	en
dc.subject.other	Cobalt	en
dc.title	Process for the recovery of cobalt and nickel in the presence of magnesium and calcium from sulphate solutions by Versatic 10 and Cyanex 272	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2003.12.003	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2003.12.003	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Cobalt (II) and nickel (II) were simultaneously extracted from magnesium and calcium synthetic sulphate solutions using the carboxylic extractant Versatic 10. The two metals were then separated by extracting cobalt using the phosphinic acid Cyanex 272. Statistical design and analysis of experiments were used throughout in order to determine the main effects and interactions of the solvent extraction factors, which were the extraction pH at equilibrium, temperature, extractant concentration and organic to aqueous phase ratio. A statistically designed experiment was also carried out in order to study stripping of the loaded, with cobalt and nickel, Versatic 10 organic phase by using synthetic nickel spent electrolyte. Cobalt was recovered from the loaded Cyanex 272 by 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 with each of the extractants. The number of stages required for extraction and stripping processes of cobalt and nickel was also evaluated. The results of the continuous, counter current, mini plant tests clearly demonstrated the feasibility of the simultaneous recovery of cobalt and nickel from magnesium and calcium sulphate solutions by Versatic 10, as well as their separation by Cyanex 272. © 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.2003.12.003	en
dc.identifier.isi	ISI:000220452000006	en
dc.identifier.volume	17	en
dc.identifier.issue	4	en
dc.identifier.spage	535	en
dc.identifier.epage	543	en