On the Stabilization of NbV-Solutions by ZrIV and HfIV

E. Sørensen; Anne Belinda Bjerre

On the Stabilization of Nb^V-Solutions by Zr^I^V and Hf^I^V

E. Sørensen, Anne Belinda Bjerre

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Abstract

Niobium cannot be separated from zirconium or hafnium when these elements occur together in solution with common anions such as Cl^- and SO4^—. This is ascribed to the copolymerisation of Nb^v and the hydrolyzed ionic species of Zr^IVv and Hf^IV by which the colloidal particles are masked as Zr- and Hf-compounds.

In HCl the particles are positively charged as opposed to when they are in sulphate solution where the Zr- and Hf-sulphate complexes confer a negative charge. The two cases are considered separately.

Original language	English

Place of Publication	Roskilde
Publisher	Risø National Laboratory
Number of pages	24
ISBN (Print)	87-550-1369-4
Publication status	Published - 1987

Series	Denmark. Forskningscenter Risoe. Risoe-R
Number	551
ISSN	0106-2840

Keywords

Risø-R-551
Risø-R-551(EN)

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Ris r 551Final published version, 396 KB

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