METHOD FOR SEPARATING AND RECOVERING COBALT SALT AND NICKEL SALT

The present invention relates to a method for separating and recovering a cobalt salt and a nickel salt, the method including a separation step for separating a cobalt salt and a nickel salt from a rare metal-containing aqueous solution that contains at least a cobalt salt and a nickel salt as rare...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SOYA, Takanori, YOSHIZAKI, Tomoya, KOIWA, Masakazu, HANADA, Shigehisa
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a method for separating and recovering a cobalt salt and a nickel salt, the method including a separation step for separating a cobalt salt and a nickel salt from a rare metal-containing aqueous solution that contains at least a cobalt salt and a nickel salt as rare metals by means of a nanofiltration membrane. The nanofiltration membrane is such that the glucose permeability is at least 3 times the sucrose permeability, the sucrose permeability is 10% or less and the isopropyl alcohol permeability is 50% or more, when a 1000 mg/L aqueous glucose solution having a pH of 6.5, a 1000 mg/L aqueous sucrose solution, and a 1000 mg/L aqueous solution of isopropyl alcohol are passed through the filter at an operating pressure of 0.5 MPa and a temperature of 25°C.