Compositions and methods for anion absorbent metal hydroxides
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United States of America Patent
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Jul 1, 2008
Grant Date -
Jul 22, 2004
app pub date -
Jun 25, 2002
filing date -
Jun 25, 2001
priority date (Note) -
Expired
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Abstract
A metal hydroxide complex has a formula Me(OH)4*A.sub.-*nH2O or MeO2*A.sub.-*nH2O. Preferred complexes are formed in an alkaline medium, and particularly especially preferred anions include cyanide and cyanide gold complexes. Contemplated complexes are formed on a metal hydroxide (e.g., hydrated zirconium, hafnium, and titanium hydroxide), which may be disposed in a porous container. Consequently, contemplated compounds may be used in methods of reducing the concentration of an anion in an alkaline medium.
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