C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
53/311
C07F 15/04 (2006.01) C01G 51/00 (2006.01) C01G 51/04 (2006.01) C01G 53/00 (2006.01) C01G 53/10 (2006.01) C22C 19/00 (2006.01) C25C 1/20 (2006.01)
Patent
CA 1180903
ABSTRACT Separation of Cobalt and Nickel The invention relates to the preferential precipitation of cobalt from aqueous acidic sulphate solutions of nickel and cobalt. The separation is carried out by introducing at least a stoichiometric amount of Caro's Acid containing no more than a small amount of hydrogen peroxide into the nickel/cobalt solution progressively over a period of at least an hour, whilst maintaining the solution at a pH from 3.1 or 3.5 up to 4.7 by addition of an alkali metal hydroxide carbonate or bicarbonate, or at 4.3 to 4.7 with the corresponding ammonium compound, and, thereafter separating the precipitate from the aqueous cobalt depleted solution. In preferred features, the Caro's Acid solution used contains hydrogen peroxide in a mole ratio to peroxomonosulphuric acid of not more than 1:10; the Caro's Acid solution is introduced continuously or in increments of less than 1 % of the total over a period of at least an hour, the Caro's Acid is produced by reaction between 93-98 % sulphuric acid and 65-72 % aqueous hydrogen peroxide in a mole ratio of 2.7:1 to 3.5:1; the Caro's Acid solution is diluted before use; and particular amounts of Caro's Acid are used depending upon the nature of the nickel/cobalt solution, the mode of treatment, and the nature of the neutralising agent. Further separation can be effected by subsequent water and particularly not acid washing of the precipitate.
390720
Mobbs David B.
Mounsey Diana M.
Interox Chemicals Limited
Riches Mckenzie & Herbert Llp
LandOfFree
Separation of cobalt and 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 Separation of cobalt and nickel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Separation of cobalt and nickel will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1238086