Multi-stage Leaching Process

A process of leaching a metal value such as nickel and/or cobalt from a metal laden solid, for example an ore such as laterite, comprises the steps of (a) contacting the metal laden solid with a leach solution comprising a mineral acid and an organic acid such as malic acid to provide a leachate including the metal value, (b) adding further organic acid to the leachate including the metal value, and (c) using the leachate including the metal value from step (b) as at least a portion of the leach solution in step (a). Steps (a) to (c) can be repeated any number of times, for example two or three times or more.

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Patents:
CA 2,726,655

Inventor(s): VALIX MARJORIE [AU]

Type of Offer: Sale



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