Method for leaching copper oxide, replacing sulfuric acid with a non-polluting organic leaching agent
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United States of America Patent
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Dec 8, 2015
Grant Date -
Dec 19, 2013
app pub date -
Nov 28, 2011
filing date -
Dec 10, 2010
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Abstract
The invention relates to a method for leaching copper oxide without using sulfuric acid, comprising the following steps consisting in: impregnating the copper oxide using a non-polluting organic leaching agent consisting of an aqueous solution formed by tricarboxylic acid (C6H807) combined with water in a mixture having an acidity varying between a pH of 1 and 5; obtaining copper citrate; and, optionally, again irrigating the copper oxide impregnated with the non-polluting organic leaching agent, thereby obtaining a more concentrated copper citrate.
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