Method for recovering with the aid of a crown compound plutonium (iv) present in solutions, such as aqueous effluents, concentrated solutions of fission products and concentrated solutions of plutonium
CA 2031749 A1 · Owner: Cogema-Companie Generale Des Matiere Nucleaire · Inventors: Foos, Jacques; Delosge, Andre; Foos, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the recovery of Pu (IV) by using crown compounds. According to the invention the aqueous solution, containing the plutonium (IV) is placed in contact with at least one crown compound, for example DCH 18C6 dissolved in an organic diluting agent such as, benzonitrile. In the case where the solution only contains traces of Pu, it is possible to use a crown compound secured to a solid phase, such as silica. The aqueous solution is a concentrated solution of fission products, an effluent originating from an irradiated nuclear fuel reprocessing installation or a concentrated solution of plutonium with americium. Sole figure. B 10317 MDT
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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 December 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2012.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.