Process for the recovery of rhodium
CA 2415635 A1 · Owner: Gelling, Onko Jan · Inventors: Toth, Imre; Gelling, Onko Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the recovery of rhodium from an organic reaction mixture containing rhodium/phosphite ligand complex phosphite degradation products , and high-boiler organic compounds wherein A) the organic reaction mixture is subjected to an aqueous oxidative and/or acidic treatment resulting in an , aqueous-polar organic two-phase mixture B) the aqueous phase is removed, C) , solution of lipophilic phosphine and/or lipophilic phosphite in a non-polar solvent is added to the organic phase, which solvent is immiscible with the polar organic phase, resulting in a two-phase mixture containing a non-polar organic phase rich in rhodium and lipophilic phosphine and/or lipophilic phosphite …
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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 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.