Selective Acid Leaching of Mixed Hydroxide Precipitate
AssigneeSolvay SA
InventorsMaria Jose Lacadena, Alun Pryce James, Oscar Vasquez
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Abstract
The present invention relates to a process for selectively leaching nickel from a mixed hydroxide precipitate (MHP) by contacting the mixed hydroxide precipitate with an acidic leach solution and with peroxymonosulfuric acid to cause at least 75 wt.-% of the nickel to be dissolved in a leachate and at least 90 wt.-% of the cobalt to be recovered in a solid phase, based on the total amount of nickel and cobalt, respectively, present in the mixed hydroxide precipitate.
Claims15
A process for selectively leaching nickel from a mixed hydroxide precipitate by contacting the mixed hydroxide precipitate with an acidic leach solution and with peroxymonosulfuric acid to cause at least 75 wt.-% of the nickel to be dissolved in a leachate and at least 90 wt.-% of the cobalt to be recovered in a solid phase, based on the total amount of nickel and cobalt, respectively, present in the mixed hydroxide precipitate.
A process for selectively leaching nickel from a mixed hydroxide precipitate by contacting the mixed hydroxide precipitate with a composition consisting essentially of an acidic leach solution and peroxymonosulfuric acid at a temperature of from 30° C. to 80° C.
Dependencies are inferred from the claim text.