Method for separating metals such as zirconium and hafnium
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United States of America Patent
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Jun 20, 2006
Grant Date -
Jan 22, 2004
app pub date -
Sep 10, 2001
filing date -
Sep 11, 2000
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Abstract
A method for separating a metal (a) from a metal (2), preferably zirconium from hafnium, which consists in dissolving said metals in an aqueous solution wherein said metals are in a state preventing them from passing through a nanofiltration membrane; treating the aqueous medium with a ligand, for example EDTA, which is complexed with metal (1) and/or metal (2), then in passing the resulting treated medium on a filtering membrane allowing through the ligand-metal complexes, but retaining the metals not complexed with the ligand.
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