| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 212510 | Hydrometallurgy | 2012 | 4 Pages |
The processes of triuranium octoxide dissolution by nitric acid with and without addition of ammonium nitrate were investigated in the temperature range 75–95 °C and in the acid concentration range 3.0–14.36 mol/L. The optimal effect of nitrogen oxide reduction to elementary nitrogen was obtained by adding of ammonium nitrate in the concentration range 1–2 mol/L and at temperature 75 °C. The kinetics of triuranium octoxide dissolution by nitric acid solutions (3.0 mol/L) with and without addition of ammonium nitrate were studied. The highest dissolution rate was obtained at concentration of ammonium nitrate 2 mol/L and temperature 368 K. The source of ammonium nitrate in the technology of uranium refining can be ammonium polyuranate.
► The U3O8 dissolution in HNO3 with and without addition of NH4NO3 are investigated. ► Addition of NH4NO3 (1 - 2 mol/l) decreases the amount of NOX emitted by 50 - 90%. ► Addition of NH4NO3 (1 - 2 mol/l) decreases nitric acid consumption by 20 - 25%. ► The source of ammonium nitrate in uranium technology can be ammonium polyuranate.
