Method for eliminating nickel ions and lead ions from...

Details Method for eliminating nickel ions and lead ions from... Method for eliminating nickel ions and lead ions from...

C - Chemistry, Metallurgy

22

B

C22B 3/44 (2006.01) C01G 21/21 (2006.01) C01G 49/10 (2006.01) C01G 53/11 (2006.01) C02F 1/52 (2006.01) C02F 1/62 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2408356

For purifying an iron(II) salt solution contaminated with nickel ions and lead ions, the hyperstoichiometric addition of sodium sulfide or sodium hydrogen sulfide in the acid range has proved itself as suitable when a residence time in the order of one hour is adhered to before the sulfides are removed by filtration. The residual contents are equal to less than 30 mg per liter for nickel and less than 7.5 mg per liter for lead.

Procédé de purification de solutions de sel ferreux (II) contaminées par des ions de nickel et de plomb selon lequel l'ajout hyperstoechiométrique de sulfure de sodium ou d'hydrogénosulfure de sodium dans la plage acide s'est révélé approprié lorsqu'une durée de séjour de l'ordre d'une heure est respectée avant l'élimination des sulfures par filtrage. Les teneurs résiduelles sont alors de moins de 30 mg par litre pour le nickel et de moins de 7,5 mg par litre pour le plomb.

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