Method in the production of hydrogen peroxide
CA 1203670 A · Owner: Eka Ab · Inventors: Franzen, Bengt G.; Herrmann, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CANADIAN PATENT APPLICATION, OF, BENGT GUSTAF FRANZ?N AND, WOLFGANG HERRMANN, FOR, A METHOD IN THE PRODUCTION OF HYDROGEN PEROXIDE Abstract of the Disclosure, A method in the production of hydrogen peroxide by the anthraquinone process is described in which method, anthraquinone derivatives dissolved in a working solution are subjected alternatingly to hydrogenation and oxidation. To reduce the relative moisture in the working solution to a suitable level of 20-98%, preferably 40-85% the working, solution is dried prior to hydrogenation by contacting it with a gas or a gaseous mixture, the water vapor pressure of which is below that of the working solution. Suitable gases or gas mixtures …
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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 April 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 2003.
- 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
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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.