Nickel recovery

Details Nickel recovery Nickel recovery

C - Chemistry, Metallurgy

22

B

53/305

C22B 7/00 (2006.01) B01J 23/94 (2006.01) B01J 27/32 (2006.01) C01G 53/04 (2006.01) C01G 53/06 (2006.01) C01G 53/08 (2006.01) C01G 53/10 (2006.01) C01G 53/12 (2006.01) C10J 3/00 (2006.01)

Patent

CA 1097927

TITLE OF THE INVENTION NICKEL RECOVERY ABSTRACT OF THE DISCLOSURE A nickel-containing residue such as coal ash remains after a carbonaceous material is gasified in the presence of a nickel catalyst. Nickel is recovered from the residue by adding an aqueous ammonia solution or aqueous solution containing ammonia and an ammonium salt to the residue to form a nickel ammine solution. Insoluble contents are separated from the nickel ammine solution, to which ammonia is further added to precipitate the nickel ammine.

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