摘要:
A process for the recovery of nickel and/or cobalt from an impure nickel, cobalt or mixed nickel/cobalt material including the steps of: a) providing a nickel, cobalt or mixed nickel/cobalt material; and b) contacting the nickel, cobalt or mixed nickel/cobalt material with a feed ammoniacal ammonium carbonate solution and a reductant in a leach step.
摘要:
A process for producing a cobalt III encapsulated nickel hydroxide or basic nickel carbonate product including the steps of: (i) providing an ammoniacal solution including cobalt ammine complexes and nickel II ammine complexes; (ii) progressively lowering the ammonia content to sequentially precipate the nickel as an hydroxide or basic carbonate; and (iii) further lowering the ammonia content to precipitate the majority of the cobalt as cobalt III oxide hydroxide; wherein the majority of cobalt III oxide hydroxide coats on the surface of the precipitate nickel hydroxide or basic nickel carbonate to form a coated particle.