Ferrous dithionite process and compositions for removing...

Details Ferrous dithionite process and compositions for removing... Ferrous dithionite process and compositions for removing...

C - Chemistry, Metallurgy

02

F

C02F 1/62 (2006.01) C02F 1/52 (2006.01) C02F 1/66 (2006.01) C02F 1/68 (2006.01)

Patent

CA 2065479

Heavy metal ions react with ferrous dithionite in acidic aqueous solution. They are reduced to metallic particles that are suitable for recycling and reuse when recovered from the acidic water. When chelating agents are present, they are deactivated by bonding to the ferrous ions. Ferrous dithionite, (FeS2O4) is either generated in-situ or ferrous ions and dithionite ions can be provided by other methods.

Réaction d'ions de métaux lourds avec du dithionite ferreux dans une solution aqueuse acide. Ils sont réduits en particules métalliques pouvant être recyclés et réutilisés, après récupération de l'eau acide. Lorsqu'il y a présence d'agents chélateurs, ils sont désactivés par liaison avec les ions ferreux. On peut avoir soit production de dithionite ferreux (FeS2O4) sur place, soit production d'ions ferreux et d'ions dithionite par d'autres méthodes.

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