Treatment of rare-earth concentrate to remove phosphorus and fluorine compounds

Treatment of rare-earth concentrate to remove phosphorus and fluorine compounds It was suggested to purify poor lanthanide concentrate precipitated from the extraction orthophosphoric acid produced by the dihydrate process to remove phosphorus and fluorine compounds by heating a mixture of the concentrate with sulfuric acid in the presence of hydrated silica followed by water leaching of water-soluble sulfates and phosphates. The treatment conditions for the separation of the bulk of phosphorus(V) and the entire fluorine in the form of SiF4 were determined, ensuring approximately 3.5-fold increase in lanthanide concentration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Treatment of rare-earth concentrate to remove phosphorus and fluorine compounds

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Chemistry; Industrial Chemistry/Chemical Engineering; Chemistry/Food Science, general
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427210110042
Publisher site
See Article on Publisher Site

Abstract

It was suggested to purify poor lanthanide concentrate precipitated from the extraction orthophosphoric acid produced by the dihydrate process to remove phosphorus and fluorine compounds by heating a mixture of the concentrate with sulfuric acid in the presence of hydrated silica followed by water leaching of water-soluble sulfates and phosphates. The treatment conditions for the separation of the bulk of phosphorus(V) and the entire fluorine in the form of SiF4 were determined, ensuring approximately 3.5-fold increase in lanthanide concentration.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Dec 24, 2010

References

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