It is shown that an increase in the recovery of rare earth elements in fluorophosphate concentrates, which are obtained by treating the wet process phosphoric acid by ammonium fluoride, is achieved by prior partial neutralization of H3PO4 by ammonia. Therewith the consumption of ammonium fluoride is reduced that provides almost complete precipitation of rare earth elements.
Russian Journal of Applied Chemistry – Springer Journals
Published: Jun 28, 2013
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