Method for producing hydrogen peroxide
CA 2398330 A1 · Owner: Glenneberg, Jurgen · Inventors: Wagner, Rudolf; Haas, Thomas; Vanheertum, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing hydrogen peroxide according to the anthraquinone method. The aim of the inventive improvement is the reduction of epoxides in the oxidation stage. According to the invention the , hydrogenated working solution, containing a 2-alkyltetrahydroanthrahydroquinone, is mixed with a partially or preferably completely oxidised working solution and the mixture is oxidised in the oxidation reactor with a gas containing oxygen. The volume ratio of hydrogenated working solution to oxidised working solution is between 5 to 1 to 1 to 5, especially 2 to 1 to 1 to 2.
Read the whole patent
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 March 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2023.
- 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.