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- Publisher
- Springer Journals
- Copyright
- Copyright © Springer Science+Business Media, LLC, part of Springer Nature 2021
- ISSN
- 1063-4258
- eISSN
- 1573-8205
- DOI
- 10.1007/s10512-021-00778-9
- Publisher site
- See Article on Publisher Site
Abstract
The possibility and efficacy of purifying a solution of rare-earth elements after nitric-acid decomposition of loparite concentrate from thorium by means of sorption on VP-1AP anionite and chemical precipitation in the form of iron-thorium cake were studied and evaluated. Pilot tests of the loparite concentrate processing technology show effective release of the sum of rare-earth elements and thorium into the liquid phase. The conditions for the combined sorption extraction of thorium and rare-earth elements under static and dynamic conditions on the VP-1AP anion exchanger were determined. It is shown that the capacity of the sorbent can be restored by regeneration with a 4M НNO3 solution. Nitric acid leaching of loparite at 110°C followed by precipitation of thorium at pH 4 ensured 98% rare-earth extraction.
Journal
Atomic Energy – Springer Journals
Published: Jun 1, 2021