Cobalt recovery method
CA 1279197 C · Owner: Starloy Industrial Co. Ltd. · Inventors: Ohtsuka, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coblat recovery method comprising a step of selectively shifting cobalt ion into an extraction agent mainly composed of either 2-ethyl hexylphosphonate mono- 2-ethyl hexylester or di-2 ethyl hexylphosphate in order to extract and separate cobalt from a solution containing cobalt salts, a step of stripping cobalt into an aqueous solution of oxalic acid by bringing the extraction agent containing cobalt into contact with the aqueous solution of oxalic acid after the separation from nickel ion, sodium salt, calcium salt etc. and, a step of recovering cobalt oxalate which does not contain any other salt.
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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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.