Process for making nickel hydroxide
CA 2546499 C · Owner: Texaco Ovonic Battery Systems Llc · Inventors: Zallen, Avram; Benet, Gabriel E.; Fierro, Cristian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A preferred embodiment of the present invention provides a process for making nickel sulfate by converting nickel metal into nickel sulfate which may be , converted to nickel hydroxide. Nickel metal is dissolved in sulfuric acid and oxygen containing gas is introduced to produce a nickel sulfate solution having nickel sulfate and water as illustrated in the following chemical equation. Ni + H2SO4 + 1/ 2O2 .fwdarw.NiSO4 + H2O The nickel sulfate is filtered and sulfuric acid is continually added to maintain stoichiometry within a reactor until the nickel metal is dissolved. The sulfuric acid oxygen containing gas and nickel metal may be heated to facilitate the desired reaction. Then, …
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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
- Filed November 23, 2004 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Timeline
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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.