Resin-in-pulp method for recovery of nickel and cobalt
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United States of America Patent
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-
Feb 26, 2002
Grant Date -
N/A
app pub date -
Feb 29, 2000
filing date -
Oct 15, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for the direct recovery of nickel and cobalt from a nickeliferous oxide ore leach slurry by ion exchange. A nickeliferous ore is leached with mineral acid to solubilize the metals. The resulting leach slurry is contacted with ion exchange resin, which selectively loads the nickel and cobalt from the pulp. The resin is separated from the leach slurry by screening and then stripped with an acidic solution. After stripping, the resin is returned to the loading cycle. Nickel and/or cobalt can be recovered in substantially pure form from the eluate by known processes. The metal-depleted slurry proceeds to waste treatment and disposal. This process eliminates the difficult solid/liquid separation, which would otherwise be required to recover metals values from the pregnant leach slurry.
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