Use of molecular weight-enlarged catalysts in a process for asymmetric, continuous hydrogenation, novel molecular weight-enlarged ligands and catalysts
CA 2331872 A1 · Owner: Degussa-Huls Aktiengesellschaft · Inventors: Laue, Stephan; Wandrey, Christian; Bommarius, Andreas
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 use of molecular weightenlarged, homogeneously soluble catalysts in a process for the asymmetric, continuous hydrogenation of C=C C=N or C=O, double bonds by means of molecular weight-enlarged homogeneously soluble catalysts in a membrane reactor. Hydrogenation processes hitherto proposed in the prior art operate discontinuously. Continuous operation in contrast, helps to save on process costs. Novel molecular weight-enlarged ligands and catalysts are also stated.
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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 January 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2023.
- 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.