Purification of nickel electrolyte by electrolytic oxidation
CA 1064856 A · Owner: Inco Limited · Inventors: Illis, Alexander; Brandt, Bernardus J.; Borbely, Gyula J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The presence of one or more of cobalt iron, arsenic, and lead is most substantially reduced in a nickel-containing electrolyte by an electrochemical process utilizing a high current density at the cathode in an electrolytic cell containing specific quantities of chlorides of alkali metals to form a fine nickel hydroxide precipitate. In a subsequent time dependent reaction under controlled pH conditions nickel hydroxide reacts with the electrolyte to form insoluble precipitates of cobalt, iron, arsenic and lead which are removed from the electrolyte by filtration.
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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 October 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 23, 1996.
- 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.