Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin

Tsuyoshi Arai, Yuezhou Wei, Mikio Kumagai, Kenichi Horiguchi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

To separate rare earths in nitric acid medium by anion exchange process, a novel silica-based macro-reticular anion exchange resin (SiPyR-N4) with pyridinium as functional group has been synthesized. It was found that the SiPyR-N4 resin exhibits a quite strong adsorption for some rare earths especially the light rare earth elements such as La, Ce, Pr, Nd and Pm whose distribution coefficients onto SiPyR-N4 reach 10-25 dm3/kg-resin, which are much higher than the reported values for these elements with conventional anion exchange resins. The results from the column experiments show that the rare earths can be separated into the three groups: light, moderate and heavy rare earths and, a perfect separation between La-Pr group and Sm-Gd group can be achieved.

Original languageEnglish
Pages (from-to)1008-1012
Number of pages5
JournalJournal of Alloys and Compounds
Volume408-412
DOIs
Publication statusPublished - 2006 Feb 9
Externally publishedYes

Fingerprint

Anion Exchange Resins
Nitric Acid
Nitric acid
Silicon Dioxide
Rare earths
Ion exchange
Negative ions
Resins
Silica
Rare earth elements
Functional groups
Anions
Macros
Adsorption
Experiments

Keywords

  • Metals
  • Molecule
  • Polymers

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin. / Arai, Tsuyoshi; Wei, Yuezhou; Kumagai, Mikio; Horiguchi, Kenichi.

In: Journal of Alloys and Compounds, Vol. 408-412, 09.02.2006, p. 1008-1012.

Research output: Contribution to journalArticle

Arai, Tsuyoshi ; Wei, Yuezhou ; Kumagai, Mikio ; Horiguchi, Kenichi. / Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin. In: Journal of Alloys and Compounds. 2006 ; Vol. 408-412. pp. 1008-1012.
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