Title:
METHOD OF RECOVERING URANIUM (VI)
Document Type and Number:
Japanese Patent JPS57110324
Kind Code:
A
Abstract:
Process for the recovery of uranium (VI) present in a phosphoric acid solution by contacting the latter with an organic solvent able to extract uranium, the organic solvent comprising a system of extractants constituted by a neutral phosphine oxide and an acid organophosphorus compound. The process comprises a re-extraction stage for the uranium extracted in the organic solvent, said re-extraction stage being performed in a re-extraction apparatus comprising at least two stages in which the uranium-containing organic solvent is circulated in the said stages by introducing it into the first stage, an aqueous ammonium carbonate solution is circulated in countercurrent with respect to the organic solvent in the said stages by introducing it into the final stage in a quantity such that it represents 50 to 80% of the stoichiometric quantity necessary for neutralizing the acid organophosphorus compound and for transforming the uranium present in the organic solvent into uranyl ammonium tricarbonate, ammonia being added in the form of a gas or an aqueous solution to the ammonium carbonate solution circulating in the first stage in order to keep the pH of the final stage as a value between 8 and 9.5 and preferably between 8 and 8.5.
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Inventors:
KUROODO GINISUTEI
MISHIERU MARUTOU
BERUNAARU MAUBORUGUNU
MISHIERU MARUTOU
BERUNAARU MAUBORUGUNU
Application Number:
JP18216381A
Publication Date:
July 09, 1982
Filing Date:
November 13, 1981
Export Citation:
Assignee:
COMMISSARIAT ENERGIE ATOMIQUE
International Classes:
B01D59/32; C22B60/02; (IPC1-7): B01D59/24
Previous Patent: JPS57110323
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