A method for preparing uranium-depleted α-UO3 and its application in the catalytic synthesis of nitrosamines or their derivatives.

By preparing α-UO3 catalysts using depleted UF6 as raw materials, the problem of safe disposal of depleted uranium was solved. Furthermore, nitrosobenzene was synthesized through a low-cost oxidation reaction, realizing an efficient and green method for synthesizing nitrosobenzene and solving the problems of high cost and toxic emissions in existing technologies.

CN118237013BActive Publication Date: 2026-07-24LANZHOU UNIV
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Patent Information

Application Number
CN202410342210.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-25
Publication Date
2026-07-24
Estimated Expiration
2044-03-25

AI Technical Summary

Technical Problem

How to safely dispose of and reuse the large amount of depleted uranium produced after a nuclear reaction, and the fact that existing methods for synthesizing nitrosobenzene are costly and that the emission of toxic oxidants has not been effectively addressed.

Method used

Using U3O8 obtained from depleted UF6 as raw material, an α-UO3 catalyst was prepared by a simple dissolution and precipitation method. The α-UO3 catalyst was then used to oxidize aniline or its derivatives in the presence of hydrogen peroxide to synthesize nitrosobenzene or its derivatives.

Benefits of technology

This approach enables the safe utilization of depleted uranium, reduces oxidant costs, decreases toxic emissions, and improves the specificity and yield of nitrosobenzene synthesis.

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Abstract

With the expansion of nuclear energy utilization, the safe disposal and reuse of the large amounts of depleted uranium produced after nuclear enrichment has become an urgent issue in pollution prevention and control. This invention aims to explore a method for the safe disposal and reuse of depleted uranium (…). 238 A new model for utilizing uranium (which poses no radioactive harm to humans) specifically involves using U3O8, obtained from depleted UF6, as a raw material to prepare α-UO3 via a simple dissolution-reprecipitation method. Using α-UO3 as a catalyst, an organic solvent as the reaction solvent, and hydrogen peroxide as the oxidant, aniline or its derivatives can be selectively oxidized to nitrosamine or its derivatives. This invention innovatively solves the problem of reusing depleted uranium waste, providing a new approach to nuclear waste treatment. Furthermore, by converting aniline and its derivatives into higher value-added nitrosamine or its derivatives, it maximizes resource utilization. Whether from the perspective of environmental protection and sustainable development, or from the perspective of increasing the added value of the product, this invention has extremely important value and far-reaching significance.
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