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AssigneeVale S.A.
InventorsRenato de Souza Costa, Flavia Dutra Mendes
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“HYBRID PROCESS USING ION EXCHANGE RESINS IN THE SELECTIVE RECOVERY OF NICKEL AND COBALT FROM LEACHING EFFLUENTS” The present invention is directed to a hybrid process using ion exchange resins in the selective recovery of nickel and cobalt of leaching effluents that is comprised of the steps of processing (1) the laterite ore (M), which is then treated through leaching (2) (either atmospheric or under pressure), considering solutions from the solid-liquid separation step of existing plants already in operation (2) as well, in a way that the downstream process comprises an ion exchange hybrid circuit, wherein the first ion exchange step (3) with resins (Re) exhibits specific selectivity conditions for the removal of iron, aluminum and copper and an increased pH, and the second ion exchange step (4) allows the removal of nickel and cobalt.
“HYBRID PROCESS USING ION EXCHANGE RESINS IN THE SELECTIVE RECOVERY OF NICKEL AND COBALT FROM LEACHING EFFLUENTS”, comprised of the steps of processing (1) laterite ore (M), being later treated for leaching (2) (atmospheric or pressurized) and including the option of treating the solution from the solid-liquid separation in existing plants (2), said process being characterized by including a cationic or chelating resin hybrid circuit, the first step (3) of ion exchange with resins (Re) exhibiting specific selectivity conditions for the removal of iron, aluminum and copper and the increase of the pH, and the second step (4) of ion exchange with resins (Re) making it possible to remove nickel and cobalt.
Dependencies are inferred from the claim text.