Non-polluting treatment of alkaline uraniferous effluents contai

Details Non-polluting treatment of alkaline uraniferous effluents contai Non-polluting treatment of alkaline uraniferous effluents contai

1979-01-25

1982-09-14

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 15, 423260, C01G 4301

Patent

active

043495125

ABSTRACT:
A cyclic process for the treatment of a uraniferous liquor containing, in addition to the desired metal, sodium carbonate and/or bicarbonate and sodium sulphate, obtained by the alkaline attack of a sulphur-containing uraniferous ore, the said process comprising the neutralization of the uraniferous liquor then the fixation of the uranium and the SO.sub.4.sup.= ions over a strong anion-exchange resin, the elution thereof with an ammonium carbonate and/or bicarbonate solution in the form of an ammonium uranyl carbonate which is subsequently decomposed and ammonium sulphate, the precipitation and the calcination of the precipitated uranates and/or diuranates with regeneration of the eluent solution of ammonium carbonate and/or bicarbonate, the causticiation of the liquor freed from uranium which leaves the anion-exchange resin to eliminate the SO.sub.4.sup.= ions in calcium form, recycling a carbonated and/or bicarbonated liquor which is free from SO.sub.4.sup.= ions to the attack of the ore, finally the regeneration of the elution liquor of the SO.sub.4.sup.= ions and of the uranium.

REFERENCES:
patent: 2863717 (1958-12-01), Kunin
patent: 2900227 (1959-08-01), Dancy et al.
patent: 2982605 (1961-05-01), Mouret et al.
patent: 3000696 (1961-09-01), Teichmann
patent: 3445201 (1969-05-01), Wheelwright
patent: 3961027 (1976-06-01), Crossley

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