C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/26 (2006.01) C22B 19/00 (2006.01)
Patent
CA 2394658
The invention relates to a process involving the following steps: a) performing leaching of the raw material with an acid aqueous solution to dissolve the zinc if said raw material is a solid; b) optionally performing solid-liquid separation; c) neutralizing the aqueous solution once the zinc-containing raw material is in liquid form; d) performing solid-liquid separation of the solution rich in zinc from the solids precipitated during the neutralization step; e) extracting the zinc using an acid organic solvent; f) purifying the organic solvent from the extraction step; g) re-extracting zinc from the organic solvent using an acid aqueous solution; h) recovering the zinc by electrolysis and/or crystallization and/or precipitation.
L'invention concerne un procédé consistant à a) effectuer la lixiviation de la matière première avec une solution aqueuse acide de manière à dissoudre le zinc, b) séparer éventuellement le solide du liquide, c) à neutraliser la solution aqueuse lorsque la matière première contenant du zinc est sous forme liquide, d) à séparer le solide/liquide de la solution riche en zinc des solides précipités à l'étape c), e) à extraire le zinc via un solvant organique acide, f) à purifier le solvant organique obtenu sous e), g) à réextraire le zinc du solvant organique moyennant une solution aqueuse acide et h) à récupérer le zinc par électrolyse et/ou cristallisation et/ou précipitation.
Diaz Nogueira Gustavo
Garcia Leon Miguel Angel
Martin San Lorenzo Daniel
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Tecnicas Reunidas S.a.
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