Zirconium and hafnium separation in sulfate solutions using continuous ion exchange chromatography
CA 2224090 A1 · Owner: Westinghouse Electric Corporation · Inventors: Beleski, Richard; Francis, Timothy Lloyd; Snyder, Thomas Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for improved continuous ion exchange chromatographic elemental separations of zirconium and hafnium and also for isotopic separations thereof from crude zirconium minerals by using zirconium (also containing hafnium) sulfate feedstock solutions sulfate eluant solutions, anionic exchange resins and reduced ion, exchange column operating temperatures. The method and system of the invention provides sulfate feedstock solutions by completely converting the carbochlorination products of zircon sand to sulfate solutions prior to feeding to the ion exchange chromatographic column. The method and system of the invention is performed in a continuously operating continuous annular …
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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 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2020.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.