C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/04 (2006.01) C22B 3/06 (2006.01) C22B 3/20 (2006.01) C22B 23/00 (2006.01) C25C 1/06 (2006.01) C25C 1/08 (2006.01) C25C 7/06 (2006.01)
Patent
CA 2137124
A method of pressure leaching nickel and cobalt from sulphidic precipitates is provided, wherein such precipitates are leached with chlorine at a controlled redox potential of between 400 and 550 mV (Ag/AgCl), catalysed by copper, and at a temperature of between 120 and 160°C, to dissolve at least 80% of cobalt and to oxidize less than 10% of sulphur to sulphate.
Divulgation d'une méthode pour le lessivage sous pression de nickel et de cobalt à partir de précipités sulfurés; ce type de précipité est lessivé avec du chlore à un potentiel rédox contrôlé se situant entre 400 et 550 mV (Ag/AgCl), en présence d'un catalyseur au cuivre et à une température de 120 à 160 degrés C, de façon à dissoudre au moins 80 % du cobalt et d'oxyder moins de 10 % du soufre en sulfate.
Dunn Ronald Ross
Xue Tao
Falconbridge Limited
Goudreau Gage Dubuc
LandOfFree
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