Removal of non-water soluble substances from solutions of aqueous metal extracts
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United States of America Patent
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Sep 4, 2007
Grant Date -
Jan 4, 2007
app pub date -
Jul 31, 2006
filing date -
Apr 20, 2001
priority date (Note) -
Expired
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Abstract
The invention relates to methods and a device for the removal of non-water soluble substances from solutions of aqueous metal extracts, by addition of at least one water-soluble cationic polyelectrolyte, containing a diallylaminoalkyl(meth)acrylamide, neutralized or quaternised with mineral acid and subsequently polymerized, preferably dimethylaminopropylacrylamide.
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