REMOVAL OF FERRIC IRON AS HEMATITE AT ATMOSPHERIC PRESSURE

REMOVAL OF FERRIC IRON AS HEMATITE AT ATMOSPHERIC PRESSURE

A process for the removal of ferric iron as hematite from a nickel solution containing ferric and ferrous ions including the steps of: raising the temperature of the nickel solution to between 90° C. and the boiling point of the solution at atmospheric pressure; raising the pH of the nickel solution...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: AGUILAR, Renato Antonio Loaiza, DE HOYOS, Ruben Rangel, RODRÍGUEZ, Carolina Isabel Meneses, LIU, Houyuan
Format: Patent
Sprache:eng ; fre ; ger
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:A process for the removal of ferric iron as hematite from a nickel solution containing ferric and ferrous ions including the steps of: raising the temperature of the nickel solution to between 90° C. and the boiling point of the solution at atmospheric pressure; raising the pH of the nickel solution to be between 2 and 3; and adding a hematite seed to facilitate hematite precipitation, wherein ferric ions are precipitated as hematite in a predominantly crystalline form.