uranium thorium separation

Separation of thorium from uranium ore SpringerLink

2019-12-7  Once the thorium and uranium are separated from the bulk mass, an anion exchange column was used for a more selective separation. Anion exchange was chosen rather than cation exchange because thorium tends to bind irreversibly to cation exchange resins due to slow kinetics and an extremely high distribution coefficient.

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SEPARATION OF URANIUM AND THORIUM (Journal Article)

A simple and direct ion-exchange method has been suggested for the separation of uranium from thorium. Both the elements are absorbed by the resin (Amberlite lR) from which uranium can be eluted first with 1.70 M hydrochloric acid. After neutralizing the acid by running ammonia solution through the resin column, thorium is eluted with l.1 M ...

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Separation of uranium and thorium from rare earths for ...

2015-6-1  The separation of uranium(VI), thorium and rare earths in a series of acidic solutions with Cyanex 923 (a mixture of tri-alkylphosphine oxides) was investigated (Gupta et al., 2002). It was found that uranium could be separated well from rare earths in HCl and possibly H 2 SO 4 solutions . However, it is difficult to separate uranium from thorium.

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SEPARATION OF URANIUM FROM THORIUM (Journal Article ...

On exposure of thorium to slow neutrons a small amount of uranium is formed in the irradiated material. From the irradiation product an aqueous solution is prepared of thorium and uranium nitrates the proportion of nitrate: water ranging from 0.7: 1 to 1.4: 1 and the proportion of uranium: thorium

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Separation of Uranium, Thorium, and the Rare Earth ...

2020-12-1  Separation of Uranium, Thorium, and the Rare Earth Elements by Anion Exchange. Johann. Korkisch; and ; Gustaf. Arrhenius

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SEPARATION OF THORIUM FROM URANIUM (Journal Article ...

The U.S. Department of Energy's Office of Scientific and Technical Information

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Separation of thorium, uranium, and rare earths from a ...

2020-11-1  According to a review study performed by Zhu et al. (2015), the removal of uranium and thorium from rare earths is typically achieved via solvent extraction or precipitation. In comparison to solvent extraction, precipitation takes advantage of different precipitation pH of thorium, uranium, and rare earths to achieve the separation.

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Separation of thorium and uranium in nitric acid solution ...

2016-9-30  To separate thorium and uranium in nitric acid solution using anion exchange process, a strong base silica-based anion exchange resin (SiPyR-N4) was synthesized. Batch experiments were conducted and the separation factor of thorium and uranium in 9 M nitric acid was about 10. Ion exchange chromatography was applied to separate thorium and uranium in different ratios.

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Separation of Uranium and Thorium from Monazite Ore

2016-4-1  separation method for uranium and thorium isotopes from monazite ore contaning lanthanide uranium, thorium nature radioactive isotopes we obtained monazite ore from locations in the Nile Valley, Egypt Damietta and Rosetta) using a separation by hollow fiber supported liquid membrane system After the separation, uranium, thorium

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CHLORINATION VOLATILITY SEPARATION OF THORIUM AND URANIUM ...

Chlorination separation of uranium, thorium, and radium from low-grade ores Journal Article Sastri, V S ; Perumareddi, J R - Separation Science and Technology Low-temperature chlorination of low-grade uranium ores containing uranium in the 0.02 to 0.06% range, thorium in the 0.036 to 0.12% range, and radium in the 70 to 200 pci/g range resulted in the extraction of >90% of the constituents.

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Separation of uranium and thorium using tris(2-ethylhexyl ...

The distribution behavior of uranium and thorium has been investigated in a biphasic system of different aqueous nitric acid concentrations and a solution of tris(2-ethylhexyl) phosphate (TEHP) inn-dodecane at 25°C. The effect of different uranium and thorium concentrations in the aqueous phase on the extraction of these metal ions is evaluated.

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Separation of thorium and uranium by sulfide method ...

The obtained results were also compared with thermodynamic consideration. Then, separation of uranium from thorium was suggested by selective sulfurization of uranium oxides. Finally, it was summarized that most of thorium oxide could be recovered as ThO 2 after the separation of sulfurized uranium

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Separation of Uranium and Thorium from Monazite Ore

2016-4-1  Uranium and 86.5% Thorium were extracted from monazite ore, the hollow fiber supported liquid membrane is higher technique preferred to separate Uranium and Thorium from monazite ore. Key words: separation method, uranium and thorium,. 1-phenyl-3-methyl-4-Benzoyl pyrazolone-5-PMBP

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Separation of thorium, uranium and rare-earth elements ...

Abstract The separation of thorium, uranium and rare-earth elements (RE) as their 2-[(2-arsenophenyl)-azo]-1,8-dihydroxy-7-[(2,4,6-tribromophenyl)azo]-naphthalene-3,6-disulfonic acid complexes by capillary electrophoresis with direct UV–Vis detection is presented in this paper. The influences of pH value and concentration of electrolyte, voltage and surfactant on separation were investigated ...

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Extraction and Separation of Uranium (VI) and Thorium

2010-10-13  investigate the extraction of uranium (VI) and thorium (IV) from chloride and nitrate media with tri-n-dodecylamine (TDA) impregnated resin, to throw light on the extraction mechanism and to compare it with that in solvent extraction systems. The separation of uranium from thorium and fission products with the TDA impregnated resin was studied ...

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Separation of Uranium and Thorium for 230Th-U Dating of ...

Separation of Uranium and Thorium for 230 Th-U Dating of Submarine Hydrothermal Sulfides Article doi: 10.3791/59098. May 20th, 2019 • Lisheng Wang 1,2,3, Xuefeng Wang 1,2, Jun Ye 4, Zhibang Ma 1,2, Weifang Yang 5, Jule Xiao 1,2.

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Separation of uranium and thorium using tris(2-ethylhexyl ...

1999-4-1  Separation of uranium and thorium using tris(2-ethylhexyl) phosphate as extractant Separation of uranium and thorium using tris(2-ethylhexyl) phosphate as extractant Pathak, P.; Veeraraghavan, R.; Manchanda, V. 1999-04-01 00:00:00 Journal of Radioanalytical and Nuclear Chemistry, Vol. 240, No. 1 (1999) 15-18 P. N. Pathak, R. Veeraraghavan, V. K. Manehanda* Radiochemistry Division, Bhabha ...

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An improved radiochemical separation of uranium and ...

A radiochemical procedure for the accurate determination of uranium and thorium using peroxide fusion followed by ion exchange and extraction chromatography is described. The method of extraction of the element from solid samples is the most important factor in the investigation. It is demonstrated,

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Application of extraction chromatography to the separation ...

2007-1-26  Application of extraction chromatography to the separation of thorium and uranium dissolved in a solution of high salt concentration. Fujiwara A(1), Kameo Y, Hoshi A, Haraga T, Nakashima M. Author information: (1)Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki, Japan. [email protected]

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Thorium Extraction Methods - UC Homepages

2017-3-28  Uranium and thorium separation from rare earths by hydroxide precipitation. In contrast, precipitation of thorium in sulfate media is mostly contaminated with significant amount of phosphate. Phosphate is commonly associated with rare earth ores and forms metal phosphate which is less solvent in sulfate media, reducing the efficiency of ...

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Separation of thorium and uranium by sulfide method ...

The obtained results were also compared with thermodynamic consideration. Then, separation of uranium from thorium was suggested by selective sulfurization of uranium oxides. Finally, it was summarized that most of thorium oxide could be recovered as ThO 2 after the separation of sulfurized uranium

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Separation of Uranium and Thorium for 230Th-U Dating of ...

Separation of Uranium and Thorium for 230 Th-U Dating of Submarine Hydrothermal Sulfides Article doi: 10.3791/59098. May 20th, 2019 • Lisheng Wang 1,2,3, Xuefeng Wang 1,2, Jun Ye 4, Zhibang Ma 1,2, Weifang Yang 5, Jule Xiao 1,2.

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Separation of thorium, uranium and rare-earth elements ...

Abstract The separation of thorium, uranium and rare-earth elements (RE) as their 2-[(2-arsenophenyl)-azo]-1,8-dihydroxy-7-[(2,4,6-tribromophenyl)azo]-naphthalene-3,6-disulfonic acid complexes by capillary electrophoresis with direct UV–Vis detection is presented in this paper. The influences of pH value and concentration of electrolyte, voltage and surfactant on separation were investigated ...

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Extraction and Separation of Uranium (VI) and Thorium

2010-10-13  investigate the extraction of uranium (VI) and thorium (IV) from chloride and nitrate media with tri-n-dodecylamine (TDA) impregnated resin, to throw light on the extraction mechanism and to compare it with that in solvent extraction systems. The separation of uranium from thorium and fission products with the TDA impregnated resin was studied ...

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Separation of Uranium and Thorium from Monazite Ore

2016-4-1  Uranium and 86.5% Thorium were extracted from monazite ore, the hollow fiber supported liquid membrane is higher technique preferred to separate Uranium and Thorium from monazite ore. Key words: separation method, uranium and thorium,. 1-phenyl-3-methyl-4-Benzoyl pyrazolone-5-PMBP

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Separation of uranium and thorium using tris(2-ethylhexyl ...

1999-4-1  Separation of uranium and thorium using tris(2-ethylhexyl) phosphate as extractant Separation of uranium and thorium using tris(2-ethylhexyl) phosphate as extractant Pathak, P.; Veeraraghavan, R.; Manchanda, V. 1999-04-01 00:00:00 Journal of Radioanalytical and Nuclear Chemistry, Vol. 240, No. 1 (1999) 15-18 P. N. Pathak, R. Veeraraghavan, V. K. Manehanda* Radiochemistry Division, Bhabha ...

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A Rapid Method for the Extraction and Separation of ...

2007-2-15  (2000). A Rapid Method for the Extraction and Separation of Uranium from Thorium and Other Accompanying Elements Using Octadecyl Silica Membrane Disks Modified by Tri-n-octyl Phosphine Oxide. Separation Science and Technology: Vol. 35, No. 7, pp. 1011-1019.

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Separation and spectrophotometric determination of thorium ...

2001-6-1  Separation and spectrophotometric determination of thorium contained in uranium concentrate Separation and spectrophotometric determination of thorium contained in uranium concentrate Fukuma, H.; Fernandes, E.; Nascimento, M.; Quinelato, A. 2001-06-01 00:00:00 A method for the determination of thorium in uranium concentrate by spectrophotometry with Arsenazo III has been developed.

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Determination of uranium and thorium in geological ...

A procedure has been developed for the determination of uranium and thorium in geological samples using extraction chromatography. Following sample preparation, uranium and thorium are pre-concentrated by precipitation with iron(III) hydroxide and then separated using UTEVA resin.The separated uranium and thorium are electrodeposited onto stainless-steel discs and then measured by

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Thorium Extraction Methods - UC Homepages

2017-3-28  Uranium and thorium separation from rare earths by hydroxide precipitation. In contrast, precipitation of thorium in sulfate media is mostly contaminated with significant amount of phosphate. Phosphate is commonly associated with rare earth ores and forms metal phosphate which is less solvent in sulfate media, reducing the efficiency of ...

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