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Uranous sulfate x-hydrate will thermally decompose into uranium oxide at high temperature, releasing SO2 gas that can be recovered as sulfuric acid. The recovered acid can be recycled back to the prior hydrometallurgical crystallization step, thus offsetting the net acid consumption of the process while at the same time producing a more readily marketable oxide product. A thorough understanding of...
Uranous sulfate is known to crystallize from uranium(IV) sulfate solutions upon the addition of sulfuric acid and the application of heat. This phenomenon, when coupled with a prior reduction process, could be exploited as a new way to selectively separate uranium from impurities in a high-grade leach solution. In the present work, the selectivity of uranous sulfate precipitation in the presence of...
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