Process for the recovery of a uranium-containing concentrate...

Details Process for the recovery of a uranium-containing concentrate... Process for the recovery of a uranium-containing concentrate...

C - Chemistry, Metallurgy

22

B

53/211

C22B 60/02 (2006.01) C01B 25/46 (2006.01)

Patent

CA 1184388

ABSTRACT A uranium containing concentrate and phosphoric acid are obtained by digesting phosphate rock with H2SO4 and treating the H3PO4-solution -remaining after removal of calciumsulphate -, if so desired after evaporation, with a reducing agent, an organic dispersant and an inorganic F-compound, whereafter the resulting uraniumcontaining. precipitate is seperated off and phosphoric acid is recovered from the remaining mixture. As inorganic F-compound use is made of NH2F, which is prepared in situ by absorbing in water the gases escaping during the digestion and the optional evaporation, converting the H2SiF6-solution formed with NH3 to and SiO2-containing NH4P solution, separating off the SiO2 and applying the resulting NH4F-solution, for the uranium precipitation.

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