Solvent extraction
CA 1098322 A · Owner: Matthey Rustenburg Refiners (Proprietary) Limited · Inventors: Flett, Douglas S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the separation of cobalt from nickel by solvent extraction comprises contacting an aqueous solution containing divalent cobalt and nickel ions in the octahedral configuration with an organic phase comprising a solvent extraction agent containing an ester of phosphoric acid and then separating the organic phase containing cobalt from the aqueous phase containing nickel. The contacting is carried out at a temperature in the range of 40°C to 90°C with a concentration of 11 to 16.0 grams per liter of cobalt in the organic phase so as to convert substantially all the cobalt present in the organic phase from an octahedral configuration to a tetrahedral configuration and thus enable …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.