Method for the production of hydrogen peroxide by hydrating a chinone solution and arrangement for performing the methods
CA 2275726 A1 · Owner: Bengtsson, Erik · Inventors: Casen, Aslak; Unum, Arnfinn; Bengtsson, Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for the production of hydrogen peroxide by hydrogenating a quinone solution (working solution) oxidation , thereof and extraction of the oxidized working solution. The method is characterized in that the working solution which is to be hydrogenated consists of ethylanthraquinone in an amount of 140-170 grams/litre preferably , about 160 grams/litre, amylanthraquinone in an amount of up to 100 grams/litre, preferably about 40 grams/litre and the rest trimethylbenzen (Shellsol) and tetrabutylurea (TBU), octylcaprolactam or substituted pyrrholidones in a weight ratio of 65:35 to 70:30 preferably 70:30. The , invention also comprises an …
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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 December 16, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.