Oxidation
- UO2 + ½O2 = UO3
Oxidation of Uraninite
- 2Fe+2S2 + 7½O2 + H2O = Fe2(SO4)3 + H2SO4
Oxidation of reduced iron to ferric
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Leaching
- UO3 + Na2CO3 + 2NaHCO3 = Na4UO2(CO3)3 + H2O
pH > 8.0
- UO3 + 4NaHCO3 + H2O = Na2UO2(HCO3)4 + 2NaOH
pH < 8.0
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Loading
- R-4Cl-1 + UO2(CO3)3-4 = R-UO2(CO3)3-4 + 4Cl-1
Ion exchange of uranyltricarbonate ion to resin (R), pH > 8.0
- R-2Cl-1 + UO2(HCO3)4-2 = R-UO2(HCO3)4-2 + 2Cl-1
Ion exchange of uranyldicarbonate ion to resin (R), pH < 8.0
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Elution
- R-UO2(CO3)3-4 + 4NaCl = R-4Cl-1 + Na4UO2(CO3)3
Elution of Uranyltricarbonate
- R-UO2(HCO3)4-2 + 2NaCl = R-2Cl-1 + Na2 UO2(HCO3)4
Elution of Uranyldicarbonate
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Two Step Precipitation
- Na4UO2(CO3)3 + 6HCl = UO2Cl2 + 4NaCl + 3H2O + 3CO2
Conversion of SodiumUranyltricarbonate to Uranyl Chloride
- Na2UO2(HCO3)4 + 4HCl = UO2Cl2 + 2NaCl + 4H2O + 4CO2
Conversion of SodiumUranyldicarbonate to Uranyl Chloride
- UO2Cl2 + H2O2 + 2H2O = UO4•2H2O + 2HCl
Precipitation of Uranyl Chloride to Uranium Oxide
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