C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/22 (2006.01) C22B 23/00 (2006.01)
Patent
CA 2113086
2113086 9301320 PCTABS00019 A process for recovering nickel that is in soluble form and in relatively low concentrations, typically up to 2 wt.%, in a liquor, comprises: (a) precipitating nickel from solution (preferably as a hydroxide or a sulphide); (b) adding an inert particulate carrier and a flocculent to the liquor to form flocs comprising nickel precipitate, inert particulate carrier, and flocculent; (c) separating the flocs from the liquor (preferably by gravitational settling or magnetic separation); and (d) separating the nickel precipitate from the flocs (preferably by agitating the flocs). The nickel precipitate and flocs are preferably then passed through a filter to remove the nickel as filter cake. The inert carrier is preferably sand, alumina, magnetite, hematite, ilmenite or calcite. The flocculent is preferably a cationic, non-ionic or anionic flocculent.
Dawn Annette Hoefer Trustee Of Modern Environmental Service Trus
Swabey Ogilvy Renault
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