Separation of iron from value metals in leaching of laterite ores

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United States of America Patent

PATENT NO 8916116
SERIAL NO

13711874

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Abstract

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The invention provides a process for the leaching of a laterite ore, concentrate, tailings or waste rock for the recovery of value metals, at least one value metal being nickel. The laterite ore or concentrate is subjected to a leaching step with a lixiviant comprising hydrochloric acid to leach nickel from the laterite ore, followed by a liquid/solids separation step. The liquid obtained is subject to solvent extraction with a dialkyl ketone, to obtain a solution rich in iron and a raffinate. Separation of iron from cobalt and nickel is obtained.

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Patent Owner(s)

  • PROCESS RESEARCH ORTECH INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Jonathan Toronto, CA 30 611
DeLaat, Robert Georgetown, CA 1 4
Halim, M A East York, CA 3 19
Lakshmanan, Vaikuntam I Mississauga, US 20 141
Sridhar, Ramamritham Oakville, CA 19 183

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