C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 61/00 (2006.01) C01G 15/00 (2006.01) C22B 3/24 (2006.01) C22B 7/02 (2006.01) C25C 1/16 (2006.01)
Patent
CA 2143254
In accordance with the present invention, there is now provided a method for removing thallium ions from aqueous solutions with the use of the manganese dioxide sludge produced during the electrolysis of zinc. The preferred allotropy of MnO2 is the .alpha.-form, which selectively absorbs thallium ions with minimum interference from other elements and metal ions present in the solution, and is significantly more economical than other reagents currently used for the same purpose.
Dans cette invention, on divulgue une méthode pour éliminer les ions thallium de solutions aqueuses à l'aide de boues de dioxyde de manganèse produites au cours de l'électrolyse du zinc. De préférence, le MnO2 se trouve sous la forme allotropique .alpha., qui absorbe sélectivement les ions thallium avec une interférence minimale des autres ions présents en solution, et qui est nettement plus économique que d'autres réactifs utilisés actuellement dans le même but.
Jibiki Kyo
Goudreau Gage Dubuc
Noranda Ipco Inc.
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