Solubility of Molybdic Oxide and Its Hydrates in Nitric Acid, Nitric Acid-Ferric Nitrate, and Nitric Acid-Uranyl Nitrate Solutions.

1961 ◽  
Vol 6 (4) ◽  
pp. 600-603 ◽  
Author(s):  
L. M. Ferris
Keyword(s):  
Nitric Acid ◽  
Uranyl Nitrate ◽  
Ferric Nitrate ◽  
Molybdic Oxide ◽  
Nitrate Solutions

scholarly journals Research on obtaining gadolinium oxide from waste technologies for processing of uranium-gadolinium containing materials

2022 ◽  
Vol 2155 (1) ◽  
pp. 012026
Author(s):  
M K Kylyshkanov ◽  
N N Yaroshenko ◽  
G V Gusakova ◽  
A A Dorn ◽  
A A Gofman ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solid Waste ◽  
Uranyl Nitrate ◽  
Gadolinium Oxide ◽  
Aluminum Nitrate ◽  
Technological Scheme ◽  
Waste Processing ◽  
Two Stage ◽  
Almost All ◽  
Nitrate Solutions

Abstract One of the activities of the Uranium production of JSC “UMP” is the processing of hard-to-open uranium-gadolinium-containing scraps. When processing materials of this type, after their dissolution, the gadolinium fluoride precipitation operation is carried out with the subsequent extraction purification of the obtained uranyl nitrate solutions. At the deposition stage, almost all the gadolinium contained in the scraps is transferred to the GdF3 precipitate and sent to the tailings dump as part of the solid waste. In order to determine the possibility of obtaining gadolinium oxide from waste processing of uran-gadolinium containing materials, exploratory studies were initiated. In the course of the work, various methods of obtaining gadolinium oxide were tested. A number of experiments were carried out to refine the modes of obtaining gadolinium oxide by the method of two-stage precipitation of oxalate. A technological scheme was developed, according to which a finished product was obtained, suitable for further use in the technology of obtaining uranium-gadolinium tablets of UMP JSC. The scheme consists of the following main operations: dissolution of gadolinium fluoride in a solution of aluminum nitrate, precipitation of gadolinium oxalate, washing of gadolinium oxalate in the first stage of precipitation with a solution of nitric acid, conversion of oxalate to gadolinium hydroxide, dissolution of hydroxide in a solution of nitric acid, re-precipitation of gadolinium oxalate, calcination to gadolinium oxide.

Extraction of Am(III) by benzyldibutylamine from nitrate solutions of lanthanides

1981 ◽  
Vol 46 (1) ◽  
pp. 194-200 ◽  
Author(s):  
Marta Vojtíšková ◽  
Věra Jedináková ◽  
Libor Kuča
Keyword(s):  
Nitric Acid ◽  
Nuclear Fuel ◽  
Organic Phase ◽  
Spent Nuclear Fuel ◽  
Optimum Conditions ◽  
Separation Factors ◽  
Nitrate Solutions

Benzyldibutylamine is a suitable extractant for the separation of Am(III) and Ln(III) from the acidic nitrate solutions. The effect of lanthanides and yttrium on the extraction of Am(III) has been followed under the conditions modelling the content of these components in the spent nuclear fuel. The separation factors αAm/Ln were evaluated for the optimum conditions found for the separation of Am(III) from the lanthanides. The coextraction of nitric acid and water into the organic phase is discussed.

Extraction of nitric acid and uranyl nitrate with tributyl phosphate in diluent in the presence of salting-out agents and its mathematical description

2013 ◽  
Vol 55 (4) ◽  
pp. 369-376 ◽  
Author(s):  
E. A. Puzikov ◽  
I. V. Blazheva ◽  
B. Ya. Zilberman ◽  
Yu. S. Fedorov ◽  
A. S. Kudinov ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Uranyl Nitrate ◽  
Mathematical Description ◽  
Tributyl Phosphate ◽  
Salting Out
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