Methods of treating the oxidation mixture of hydrocarbons to respective dibasic acids
CA 2276899 A1 · Owner: Vassiliou, Eustathios · Inventors: Vassiliou, Eustathios; Dassel, Mark W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
23, This invention relates to methods of controlling the oxidation of hydrocarbons to respective dibasic acids, such as adipic acid for example by removing the , catalyst from the, reaction mixture outside the reaction zone, after the oxidation has taken place at least, partially. The catalyst is precipitated substantially in its totality by using a base, preferably, sodium hydroxide, to form the catalyst hydroxide such as cobalt hydroxide for , example. Preferably the precipitated catalyst is recycled to the reaction zone with or without further, treatment. The method may also include steps for treatment of the reaction mixture by, hydrolysis and/or electrodialysis.
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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 July 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.