Method for removing formic acid from aqueous solutions
CA 2441465 A1 · Owner: Basf Aktiengesellschaft · Inventors: Noebel, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for at least partially removing formic acid from an aqueous solution containing formic acid cyclohexanone and cyclohexanol, wherein the formic acid is decomposed on on a basic metal oxide made of metal from groups 2, 4, 5 12 and/or 14 or on a precious metal of groups 8 - 11 on an oxidic carrier in the form of a decomposition catalyst. Preferably a method , for further processing reaction products of cyclohexane oxidation is used comprising the following steps: (i) extraction of the product gas mixture obtained during cyclohexane oxidation with an aqueous washing liquid an , aqueous solution containing carboxylic acid being obtained; (ii) separation by distillation …
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 June 10, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2024.
- 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.