Recovery of nickel and cobalt from nitrate-based nickel laterite leach solutions using direct solvent extraction
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A direct solvent extraction system was developed to recover nickel and cobalt from nitrate-based nickel laterite liquors, as opposed to traditional sulphate-based liquors. The development and optimisation of promising solvent systems is reported, along with a comparison of three potential options to inform recommendations for commercial applications. Finally, an investigation into the chemical stability of the solvent extraction reagents is detailed to determine if a nitrate-based process affected reagent stability compared to a sulphate-based process.
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The solvent extraction behaviour of chromium with Bis (2,4,4-trimethylpentyl) phosphinic acid (Cyanex [R] 272)Lanagan, Matthew D. (2003)The bulk of the world's known nickel reserves are contained in laterite ores but sulphidic ores remain the main source of the Western world's nickel production. With the continuing increase in nickel consumption and the ...
Evaluating a solvent extraction process route incorporating nickel preloading of Cyanex 272 for the removal of cobalt and iron from nickel sulphate solutionsOlivier, M.; Dorfling, C.; Eksteen, Jacques (2012)Crude nickel sulphate solutions are produced during the first stage leach of Platinum Group Metal (PGM) containing converter matte in a Sherrit® atmospheric matte leach process. Iron and cobalt sulphates contaminate the ...
Hutton-Ashkenny, M.; Barnard, K.; Ibana, Don (2016)Direct solvent extraction of nickel and cobalt from nitrate-based leach liquors has become of interest due to the successful piloting of nitric acid processes for treating nickel laterite ores. The current study investigated ...