Recovery of copper from its sulfides and other sources using halogen reagents and oxidants
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United States of America Patent
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Nov 23, 1999
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N/A
app pub date -
Jul 28, 1997
filing date -
Jul 28, 1997
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Expired
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Abstract
Copper and nickel are extracted from their elemental state, complex sulfides, ores, and other materials such as scrap by leaching them with a solution containing halogen salts: bromine/bromide, or iodide/iodine, oxygen and sodium or potassium nitrate. The invented process is particularly effective for chalcopyrite and pentlandite in an autoclave at a temperature of 100.degree. C.-150.degree. C.
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