Process for treating complex cyanide
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United States of America Patent
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Feb 24, 2004
Grant Date -
N/A
app pub date -
Aug 3, 2000
filing date -
Aug 9, 1999
priority date (Note) -
Expired
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Abstract
The process of the present invention destroys cyanide, especially that associated with spent aluminum potliners, by reacting, in a preferred embodiment the crushed potliners with an effective amount of a mixture made from a chloride salt and bleach in cyanide destroying conditions. The chloride salty preferably is calcium chloride. The bleach is calcium or sodium hypochlorite. The reaction mixture generally also includes calcium carbonate as a source of carbon dioxide to accelerate the reaction rate.
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