Method for producing nickel-containing acid solution

The method for obtaining an acid solution containing nickel is obtained by treating a positive electrode material of a nickel-metal hydride battery. The method includes a water-washing step, wherein a positive electrode material of a nickel-metal hydride battery is water-washed by adding water, and...

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Bibliographische Detailangaben
Hauptverfasser:	ASANO SATOSHI, TAKANO MASATOSHI, KIKUTA NAOKO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The method for obtaining an acid solution containing nickel is obtained by treating a positive electrode material of a nickel-metal hydride battery. The method includes a water-washing step, wherein a positive electrode material of a nickel-metal hydride battery is water-washed by adding water, and then separated to form a positive electrode material after water-washing and a water-washed slurry. An acid-washing step then is performed, wherein an acid is added and mixed into the positive electrode material obtained after water-washing in the water-washing step, and, separation is performed to form a positive electrode material after acid-washing and an acid-washed slurry. A dissolution step is performed wherein the positive electrode material obtained in the acid-washing step is separated into a nickel solution and a dissolution residue by adding any one of an acid and an oxidizing agent.