Method for recovering at least one metal from an acidified...

C - Chemistry – Metallurgy – 02 – F

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C02F 11/00 (2006.01) C02F 1/26 (2006.01) C02F 1/52 (2006.01) C02F 1/72 (2006.01)

Patent

CA 2170241

A method for recovering at least one metal from an acidified waste water sludge by liquid-liquid extraction, said method comprising: providing an acidified waste water sludge comprising ions of at least one metal and organic material, treating said acidified waste water sludge with an oxidizer to convert the organic material into a form that does not have an unfavourable effect on a subsequent liquid-liquid extraction, and subjecting said treated, acidified waste water sludge to a liquid-liquid extraction thereby obtaining an organic phase loaded with ions of said at least one metal, and subsequently recovering ions of said at least one metal from said organic phase.

L'invention se rapporte à un procédé pour récupérer au moins un métal contenu dans une boue d'eaux usées acidifiée par une opération d'extraction liquide/liquide, ce procédé consistant: à prendre une boue d'eaux usées acidifiée contenant des ions d'au moins un métal ainsi que des matières organiques; à traiter cette boue d'eaux usées acidifiée avec un oxydant, afin de transformer les matières organiques en une forme qui n'a pas d'effets néfastes sur une opération d'extraction liquide/liquide ultériure; et à soumettre cette boue d'eaux usées acidifiée ainsi traitée à une opération d'extraction liquide/liquide, afin d'obtenir une phase organique chargée des ions dudit métal, puis à récupérer les ions dudit métal contenus dans ladite phase organique.

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