Regeneration of polythionate poisoned ion exchange resins used i

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal

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423 20, 299 4, 210668, 210673, 210682, C01G 4300

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044863900

ABSTRACT:
A process is described for the recovery of uranium from ore wherein the ore is leached, the resulting leachate is passed over an anion exchange resin, and the resin is then eluted with an elution solution containing an anion capable of replacing the uranyl anion captured on the resin, followed by treatment with a sulfite-containing solution so that polythionates captured on the ion exchange resin are reacted to form essentially thiosulfate and trithionate. Preferably, the sulfite solution also contains other anions.

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Nugent, The South African Industrial Chemist, 10, pp. 282-290, (11-1956).
Annamalai et al., "Operating Experience in the Recovery of Uranium at the Pawnee and Zamzaw Sites", SPE 9507, 1980.

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