Methods of purifying cobalt

C - Chemistry – Metallurgy – 22 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C22B 23/00 (2006.01) C01G 45/10 (2006.01) C01G 51/00 (2006.01) C22B 3/44 (2006.01) C25C 1/08 (2006.01)

Patent

CA 2366294

Disclosed herein is a process for selectively removing an iron constituent and a manganese constituent from a cobalt-bearing composition, in particular for removing iron and manganese impurities from cobalt-bearing leach solutions and electrolytes, comprising the steps of: (a) subjecting said composition to a first oxidation mixture of SO2 and oxygen, at conditions sufficient to oxidize said iron constituent; (b) hydrolyzing said iron constituent; (c) subjecting said composition to a second oxidation mixture of SO2 and oxygen at conditions sufficient to oxidize said manganese constituent; and (d) hydrolyzing said manganese constituent; (e) wherein, in steps (a) and (b), the composition is maintained at a pH sufficient to precipitate iron while minimizing precipitation of manganese or cobalt, and (f) wherein, in steps (c) and (d), the composition is maintained at a pH sufficient to precipitate manganese while minimizing precipitation of cobalt.

L'invention concerne un procédé d'élimination sélective d'un constituant fer et d'un constituant manganèse d'une composition comportant du cobalt, et notamment d'élimination des impuretés de fer et de manganèse de solutions de lessivage et d'électrolytes porteurs de cobalt, ce procédé comprenant les étapes consistant: (a) à soumettre cette composition à un premier mélange d'oxydation de SO¿2? et d'oxygène, dans des conditions suffisantes pour que se produise l'oxydation du constituant fer, (b) à hydrolyser ce constituant fer, (c) à soumettre cette composition à un second mélange d'oxydation de SO¿2? et d'oxygène, dans des conditions suffisantes pour que se produise l'oxydation du constituant manganèse, (d) à hydrolyser le constituant manganèse, (e) pendant les étapes (a) et (b) à conserver la composition à un pH suffisant pour que se produise la précipitation du fer, tandis que celle du manganèse et du cobalt est réduite au minimum, et (f) pendant les étapes (c) et (d) à conserver la composition à un pH suffisant pour que se produise la précipitation du manganèse, tandis que celle du cobalt est réduite au minimum.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Methods of purifying cobalt does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of purifying cobalt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of purifying cobalt will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1940298

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.