Separation and purification of tantalum from plumbomicrolite of amazonite deposit in Kola Peninsula by acid leaching and solvent extraction

Published: 19-07-2019| Version 2 | DOI: 10.17632/2h2wxbxnpw.2
Contributors:
Diana Manukovskaya,
Sofja Masloboeva

Description

A plumbomicrolite concentrate (PMC) was decomposed with the mixture of HF and H2SO4, HF and HCl, HF and HNO3 acids. Optimal conditions ensuring high recovery of tantalum and niobium (99%) into solution, and radionuclides into insoluble residue were determined. Fluoride-sulfuric acid and fluoride-nitric acid schemes were proposed for PMC processing with an extraction separation of tantalum form niobium, lead and impurities and production of high-purity tantalum compounds.

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