Process for the separation of certain elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels
CA 2090812 A1 · Owner: Compagnie Generale Des Matieres Nucleaires · Inventors: Guy, Alain; Lemaire, Marc; Chomel, Rodolph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the separation of at least one element such as Nb Sb, Ce+Pr, actinides and elements from groups VIIb and VIII of the Periodic Classification of Elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels. This process consists of contacting said aqueous solution with a solid resin based on a vinyl pyridine polymer or copolymer and separating from said solution the resin used for fixing said element or elements. The resin is in particular a poly(vinyl-4pyridine) powder in crosslinked form and the separated elements are e.g. ruthenium, rhodium, palladium technetium, manganese, cobalt, iron, nickel cerium, and praseodymium. (No …
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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 March 2, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2015.
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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.