Methods for recovering cobalt from copper solvent extraction raffinate
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United States of America Patent
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Feb 25, 2014
Grant Date -
Aug 11, 2011
app pub date -
Feb 10, 2011
filing date -
Feb 10, 2010
priority date (Note) -
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Abstract
A method for extracting cobalt from copper raffinate. First, a supply of raffinate containing at least cobalt, copper, ferric iron and nickel, is provided. The raffinate is pretreated by one or all of raising the raffinate pH level; removing solids; and, reducing ferric iron to ferrous iron. Substantially all copper is removed using first ion exchange resin selective for copper. A second ion exchange resin selective for both cobalt and nickel is used to remove the cobalt and nickel. Cobalt and nickel are separately eluted from the second ion exchange resin.
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