Abstract
Urea CO(NH2)2 is an effective selective lixiviant for uranium from phosphate raw material. Experiments were performed to determine the factors of uranium dissolution from El-Sebaiya phosphate ore. Under the optimized conditions, uranium is extracted almost completely without significant changes in the chemical composition of the phosphate ore. From the latter, highly pure uranium-free phosphoric acid can be prepared. Analysis of the kinetic data using shrinking core models shows that the uranium leaching from El-Sebaiya phosphate ore with urea is a process controlled by chemical reaction.
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