Copper leach process aids
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United States of America Patent
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Jun 25, 2002
Grant Date -
N/A
app pub date -
Nov 19, 1999
filing date -
Nov 19, 1998
priority date (Note) -
Expired
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Abstract
Methods for enhancing the leaching of copper from copper bearing ores with an aqueous sulfuric acid leach solution are disclosed wherein an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the aqueous sulfuric acid leach solution.
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