Method for producing nickel hydroxides

Details Method for producing nickel hydroxides Method for producing nickel hydroxides

C - Chemistry, Metallurgy

25

B

C25B 1/00 (2006.01) H01M 4/52 (2006.01)

Patent

CA 2372973

The invention relates to a method for producing spherical nickel hydroxide by anodically dissolving a nickel electrode and by precipitating nickel hydroxide in a completely and thoroughly mixed electrolysis cell. An electrolysis brine with a content of 20 to 50 g/l chloride ions and 1 to 7 g/l ammonia with a pH- value of 9.5 to 11.5 and a temperature of 45 to 60~ C is used.

La présente invention concerne un procédé pour produire de l'hydroxyde de nickel de type sphérique par dissolution anodique d'une électrode en nickel et par précipitation d'hydroxyde de nickel dans une cellule d'électrolyse complètement et intimement mélangée. Selon ce procédé, on utilise une saumure d'électrolyse contenant 20 à 50 g/l d'ions chlorure et 1 à 7 g/l d'ammoniac, avec un pH allant de 9,5 à 11,5 et à une température allant de 45 à 60 ·C.

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