Electrolytic process for manufacturing potassium peroxydiphosphate
CA 1291963 C · Owner: Mccarthy, Michael J. · Inventors: Mccarthy, Michael J.; Chiang, John S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a process to maintain the anolyte pH in the desired range while manufacturing potassium peroxydiphosphate on a commercial scale. The process characterized by electrolyzing an alkaline anolyte containing potassium, phosphate and, hydroxyl ions at a platinum or noble metal anode optionally in the presence of a reaction promoter. The catholyte an alkali metal hydroxide, is separated from the anolyte by a separating means permeable to anions permitting hydroxyl ions to be transferred into the anolyte thereby maintaining the pH of the anolyte in the desired range.
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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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.