- PII
- S30345693S0033831125010026-1
- DOI
- 10.7868/S3034569325010026
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 67 / Issue number 1
- Pages
- 10-17
- Abstract
- The reaction of nitric acid with formic acid, including uranium-containing solutions, was studied. Empirical equations for the dependence of the induction period duration (τ) on the concentrations of reagents and temperature were determined. The dependence of τ on the concentration of formic acid is exponential. The effect of uranium concentration on τ in denitrated solutions becomes noticeable only at temperatures lower than 60°C. The main factor affecting the completeness of denitration is the molar ratio [formic acid] : [NO]. Starting with the molar ratio of >3, uranium-containing solutions are denitrated at 90°C in an hour almost quantitatively. The resulting uranyl formate is partially precipitated. The initial stage of the reaction is accompanied by violent gas evolution. At 90°C, ~80% of the gas volume is released at this stage (about 10 s), whereas at 40°C, only ~10%.
- Keywords
- денитрация муравьиная кислота индукционный период уран
- Date of publication
- 26.12.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 15
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