Process for recovering vanadium from deactivated catalysts
CA 1071413 A · Owner: Shell Canada Limited · Inventors: Van Dongen, Robert H.; Kouwenhoven, Herman W.
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 vanadium from a deactivated catalyst, either or not in combination with regeneration of the catalyst, in which process a catalyst which has become deactivated in the catalytic treatment of a vanadium-containing hydrocarbon oil with hydrogen, is extracted with an aqueous solution of a mineral acid followed by isolation of vanadium from the vanadium-containing solution thus obtained.
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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
- Granted February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 1997.
- 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.