scholarly journals THE EFFECT OF SOLVENT TRIBUTYL PHOSPHATE CONCENTRATION ON THE DECONTAMINATION OF URANIUM EXTRACTED FROM ALUMINUM NITRATE SOLUTIONS

1954 ◽  
Author(s):  
G I Cathers
Keyword(s):  
Tributyl Phosphate ◽  
Phosphate Concentration ◽  
Aluminum Nitrate ◽  
Effect Of Solvent ◽  
Nitrate Solutions

Separation of Am and Cm by Extraction from Weakly Acidic Nitrate Solutions with Tributyl Phosphate in Isoparaffin Diluent

2018 ◽  
Vol 60 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Yu. M. Kulyako ◽  
D. A. Malikov ◽  
T. I. Trofimov ◽  
S. E. Vinokurov ◽  
K. S. Pilyushenko ◽  
...  
Keyword(s):  
Tributyl Phosphate ◽  
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.

Porous alumina ceramics by spray-pyrolyzed powder from aluminum sulfate and aluminum nitrate solutions

1994 ◽  
Vol 9 (7) ◽  
pp. 1709-1713 ◽  
Author(s):  
Kiyoshi Okada ◽  
Akihiro Tanaka ◽  
Shigeo Hayashi ◽  
Keiji Daimon ◽  
Nozomu Otsuka
Keyword(s):  
Pore Size ◽  
Aluminum Sulfate ◽  
Pore Radius ◽  
Nitrate Solution ◽  
Sulfate Solution ◽  
Aluminum Nitrate ◽  
Alumina Ceramics ◽  
Average Pore ◽  
Average Pore Radius ◽  
Nitrate Solutions

Porous α-alumina ceramics were prepared using the spray-pyrolyzed powder from aluminum nitrate solution and aluminum sulfate solution. Porosity and pore size distribution of the samples were examined with respect to the forming pressure and firing temperature. The porosity obtained changed from around 80% in the green compacts to 60–70% in the fired bodies fired at 1500 °C. The porosity of 30–40% remained even by firing at 1700 °C. Although there was no significant difference in the porosity of the fired bodies prepared from the sulfate and nitrate solutions, the fired bodies prepared from the nitrate solution showed apparently larger pore size than those from the sulfate solution. Fired bodies with an average pore radius from 0.2 to 0.8 μm can be prepared by this method. The four-point bending strength of the fired bodies, which had a porosity of 57% and an average pore radius of 0.23 μm, was 35 MPa.

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