C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/44 (2006.01) C22B 3/14 (2006.01)
Patent
CA 2068982
A process is disclosed for separating cobalt in the form of cobalt (III) hexammine sulphate from an aqueous solution containing cobalt (III) hexammine sulphate and nickel (II) hexammine sulphate comprising adding ammonium sulphate to provide an effective amount of ammonium sulphate, ammoniating the solution with an effective amount of ammonia at a temperature whereby the triple salt of cobalt (III) hexammine sulphate. nickel (II) hexammine sulphate and ammonium sulphate is precipitated, recovering the precipitated triple salt from the solution, and repulping the triple salt with an effective amount of water or aqueous ammonia solution to selectively leach nickel (II) hexammine sulphate and ammonium sulphate to produce a crystalline cobalt (III) hexammine sulphate with a Co:Ni ratio of at least 100:1. In a preferred embodiment, the aqueous solution is produced by leaching nickel-cobalt sulphides in an ammoniacal ammonium sulphate solution under an elevated pressure of an oxygen bearing gas such as air or oxygen and at an elevated temperature with an effective ammonia to metal mole ratio to oxidize nickel and cobalt sulphides to sulphates and to produce an ammoniacal leach liquor in which dissolved cobalt is predominantly in the (III) oxidation stage.
Gowling Lafleur Henderson Llp
Sherritt International Corporation
LandOfFree
Process for the separation of cobalt from nickel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the separation of cobalt from nickel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the separation of cobalt from nickel will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1983293