Method for separating zirconium and hafnium
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United States of America Patent
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Issued Date -
Jul 23, 2009
app pub date -
Oct 7, 2005
filing date -
Oct 11, 2004
priority date (Note) -
Abandoned
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Abstract
in an aqueous solution of strong inorganic acid, so as to form an aqueous solution having 7 to 12 moles of acid per liter; 2) passing the solution obtained at step 1) in an anion exchanging resin; 3) optionally eluting a fraction of said aqueous solution having 7 to 12 moles of acid per liter, enriched in hafnium; 4) removing the resin of the acid solution containing Zr and Hf; 5) passing in the resin an aqueous solution to detach the zirconium compounds fixed to the resin, and recovering a zirconium-enriched fraction.
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