HYDROMETALLURGICAL PROCESS FOR RECOVERY OF NICKEL AND COBALT
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United States of America Patent
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Issued Date -
Mar 5, 2009
app pub date -
Aug 25, 2008
filing date -
Aug 29, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention is related to a hydrometallurgical process to produce nickel as hydroxide, oxide or cathode and produce cobalt preferably as sulfides. The present invention is particularly adequate to process eluate containing nickel and cobalt. Eluates are solutions obtained from elution of ionic exchange resins, loaded (charged) in the RIP (resin-in-pulp) process of ionic exchange, to recover nickel and cobalt from effluent pulps in acid leaching. Following nickel and cobalt recovery in a RIP circuit, they are separated from each other via a continuous ionic exchange process, after which the nickel eluate is formed to produce nickel as nickel oxide by a pyrohydrolysis process.
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