Process for making an aromatic diacid in one step using a single catalyst system
CA 2384507 A1 · Owner: Mossi & Ghisolfi Overseas S.A. · Inventors: Pfrehm, Susan S.; Brownscombe, Thomas L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a process for manufacturing an aromatic diacid in one step with a single catalyst system which comprises: a) introducing into a reactor an aromatic hydrocarbon containing the number of rings desired in the product diacid with one or more alkyl groups attached to the rings; b) reacting said aromatic hydrocarbon in the presence of an oxidant supply and a single catalyst system comprising at least one catalyst selected from Group IB IIB, VB, or VIIB of the Periodic Table in a reaction medium capable of stabilizing the aromatic acids formed against further oxidation to water and CO2 or , decarboxylation to aromatic hydrocarbons and also capable of allowing the , isomerization …
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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 August 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2022.
- 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.