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Minerals & Metallurgical Processing

, Volume 34, Issue 3, pp 125–131 | Cite as

Solvent extraction and separation of cerium(III) and samarium(III) from mixed rare earth solutions using PC88A

  • V. Agarwal
  • M. S. SafarzadehEmail author
Special Issue on Rare Earth

Abstract

The solvent extraction of cerium(III) and samarium(III) from mixed solutions of all rare earth elements (REEs) except promethium using PC88A (2-ethyl hexyl phosphonic acid mono-2-ethyl hexyl ester), an acidic extractant, was investigated. The effects of aqueous equilibrium pH, various acids (sulfuric acid (H2 SO4), hydrochloric acid (HCl) and nitric acid (HNO3)), initial metal ion concentration and extractant concentration on the solvent extraction of Ce(III) and Sm(III) were systematically studied. From the experimental results, HNO3 and HCl were found to be the preflerred aqueous media for the solvent extraction of both Sm(III) and Ce(III). The most promising experimental conditions of pH, PC88A concentration and metal ion concentration were identified for the extraction of Ce(III) and Sm(III). Separation results showed that H2 SO4 at pH 2 provided the best separation between Sm(III) and Ce(III).

Key words

Solvent extraction Samarium Cerium Rare earth elements PC88A 

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© The Society for Mining, Metallurgy & Exploration 2017

Authors and Affiliations

  1. 1.Department of Materials and Metallurgical EngineeringSouth Dakota School of Mines and TechnologyRapid CityUSA

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