Recovery of uranium from solutions
CA 1263811 C · Owner: Hermens, Richard A. · Inventors: Hermens, Richard A.; Kendall, Jack B.; Partridge, Jerry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For the recovery of uranium from a solution in which the uranium is in valence (VI) a solution is, formed containing ammonium (NH4+) fluoride (F-) and, sodium hydrosulfite (Na2S2O4). This forms a precipitate (NaNH4UF6), a previously unreported compound. It can be dissolved in an aqueous solution of aluminum nitrate nonahydrate, Al(NO3)3 ? 9h2O. This produces uranyl nitrate hexahydrate, which can be extracted in solutions conventionally used for that purpose.
Read the whole patent
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 December 12, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 12, 2006.
- 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.