SELECTIVE ACID LEACHING OF MIXED HYDROXIDE PRECIPITATE

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	VASQUEZ, Oscar, LACADENA, Maria Jose, JAMES, Alun Pryce
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	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.