Process for preparing 6-aminocapronitrile
CA 2261817 A1 · Owner: Fischer, Rolf · Inventors: Roper, Michael; Schnurr, Werner; Fischer, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a process for preparing 6-aminocapronitrile or 6aminocapronitrile-hexamethylene diamine mixtures by: a) reacting 5formylvaleronitrile with ammonia and hydrogen in the presence of hydrogenation catalysts selected from the group comprising metals or metal compounds of rhenium, copper and elements of the eight subgroups a hydrogenation discharge , product being obtained; and b) extracting from the hydrogenation discharge product 6-aminocapronitrile and optionally hexamethylene diamine provided , that the hydrogenation catalyst does not contain copper nickel or copper and , nickel as its only components.
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 July 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 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.
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.