المنتجات الساخنة
Extraction of Uranium and Thorium Fuel Material
2020-9-4 Indeed, the extraction of thorium is an essential task in the industry of rare-earth elements (REEs) which are associated with several thorium raw materials [8]. Another considerable advantage when using the thorium-uranium cycle is the elimination of the production of plutonium and trans-plutonium
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Extraction of uranium, thorium and lanthanides using
The extraction behavior of uranium, thorium and lanthanides, represented by cerium and ytterbium, by Cyanex-923 has been investigated. The effect of different variables like the concentration of acids, metal ion and extractant, nature of diluent and temperature has been studied. A composition for the extracted U(VI) and Th(IV) species has been proposed. Based
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[PDF] Selective extraction of thorium from uranium and
2020-3-15 @article{Xiong2020SelectiveEO, title={Selective extraction of thorium from uranium and rare earth elements using sulfonated covalent organic framework and its membrane derivate}, author={Xiaohong Xiong and Yuan Tao and Zhiqun Yu and Li xiao Yang and Li Jun Sun and Ya Lin Fan and Feng Luo}, journal={Chemical Engineering Journal}, year={2020
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Thorium and uranium extraction from rare earth elements
2010-5-1 Technological processes for the extraction of thorium from sulfate solutions with amines date back to 1958–1959 (Crouse and Brown, 1959). Since then, a large number of limestoneon the selective separation of thorium and uranium using solvent extraction have been published.
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Selective extraction of thorium from uranium and rare
2020-3-15 In this work, a COF (covalent organic framework) adsorbent, namely [NH 4] + [COF-SO 3 −] was prepared for selective extraction of thorium from uranium, and rare earth elements. The selective adsorption towards Th(IV) is reflected on the large distribution coefficient ( K d ) of 1.34 × 10 5 mL/g, the big difference up to two orders of
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SEPARATION OF THORIUM FROM URANIUM BY
@article{osti_4235978, title = {SEPARATION OF THORIUM FROM URANIUM BY EXTRACTION}, author = {Bohlmann, E G}, abstractNote = {A method is presented for the recovery and separation of uranium and thorium values contained in an aqueous nitric acid solution which is more than 3 M in nitric acid. The uranium and thorium containing solution
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Extraction of Thorium and Uranium from Chloride
2018-6-14 Extraction of Thorium and Uranium from Chloride Solutions by T ri-n-Butyl Phosphate and T ri-n-Octyl Phosphine Oxide Kenju WATANABE* Receivrd November 4, 1963 The extraction of thorium and uranium chlorides by TBP and TOPO was studied, The composition of complexes extracted from the chloride solutions of low acid concentration was established
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chemical Technology Aqueous Biphasic Extraction of
2004-9-22 AQUEOUS BIPHASIC EXTRACTION OF URANIUM AND THORIUM FROM CONTAMINATED SOILS FINAL REPORT prepared for Office of Technology Development, U.S. Department of Energy by D. J. Chaiko, J. Gartelmani J. L. Henriksen, T. R. Krause, Deepak, Y. Vojta, E. Thuillet, and C. J. Mertz Chemical Technology Division July 1995 DISTRIBUTION OF
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Separation of thorium from uranium and rare‐earth
Uranium may be separated from thorium and rare-earth elements in a preliminary extraction with 5% or 40% v/v tri-n-butyl phosphate (TBP) in xylene and the thorium separated from the rare-earth elements in a subsequent extraction with 40% v/v TBP in xylene.
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Co-extraction of uranium and thorium NASA/ADS
The advantages of a complete solvent extraction route for the recovery of uranium and thorium. How to increase income from a uranium leach plant.
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[PDF] Selective extraction of thorium from uranium and
2020-3-15 @article{Xiong2020SelectiveEO, title={Selective extraction of thorium from uranium and rare earth elements using sulfonated covalent organic framework and its membrane derivate}, author={Xiaohong Xiong and Yuan Tao and Zhiqun Yu and Li xiao Yang and Li Jun Sun and Ya Lin Fan and Feng Luo}, journal={Chemical Engineering Journal}, year={2020
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Extraction of uranium, thorium and lanthanides using
The extraction behavior of uranium, thorium and lanthanides, represented by cerium and ytterbium, by Cyanex-923 has been investigated. The effect of different variables like the concentration of acids, metal ion and extractant, nature of diluent and temperature has been studied. A composition for the extracted U(VI) and Th(IV) species has been proposed. Based
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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
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chemical Technology Aqueous Biphasic Extraction of
2004-9-22 AQUEOUS BIPHASIC EXTRACTION OF URANIUM AND THORIUM FROM CONTAMINATED SOILS FINAL REPORT prepared for Office of Technology Development, U.S. Department of Energy by D. J. Chaiko, J. Gartelmani J. L. Henriksen, T. R. Krause, Deepak, Y. Vojta, E. Thuillet, and C. J. Mertz Chemical Technology Division July 1995 DISTRIBUTION OF
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Extraction of rare earth metals, uranium, and thorium from
2015-8-16 The interphase distribution of the salts of rare earth metals (REMs) that coexist in systems containing dialkyl phosphinate and dialkyl dithiophosphinate of quaternary ammonium base (QAB) was studied. It is shown that, in principle, binary extractants based on derivatives of phosphinic acids and QAB can be used to separate REMs from the associated metals
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Selective Extraction of Thorium from Uranium and Rare
2019-10-21 In this work, a COF (covalent organic framework) adsorbent, namely [NH 4] + [COF-SO 3-] was prepared for selective extraction of thorium from uranium, and rare earth elements. The selective adsorption towards Th(IV) is reflected on the large distribution coefficient ( K d ) of 1.34×10 5 mL/g, the big difference up to two orders of magnitude in the adsorption capacity,
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Separation of thorium from uranium and rare‐earth
Alternatively thorium and uranium may be extracted simultaneously from the solutions with 40% TBP in xylene and the thorium preferentially backwashed from the loaded solvent with dilute HNO 3. The present work indicates that processes in which uranium only is extracted in the first operation will be the most flexible and the simplest to operate.
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Separation of thorium and uranium from xenotime leach
2020-12-1 Table 6 summaries the optimum parameters of the continuous countercurrent extraction, scrubbing, and stripping processes that resulted from studies discussed in 4.1 Study on the extraction of thorium and uranium from control sulfate liquors using the primary amine N1923 and the tertiary amine TOA, 4.2 Study on the stripping of thorium and
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Solvent extraction of uranium(VI) and thorium(IV) by N,N′
2012-12-11 In order to assess the extraction ability of DTPDA, the distribution coefficient D, of uranium(VI) and thorium(IV) ions was determined at 25 °C between nitrate aqueous solution and 1,2-dichloroethane phases as a function of the ligand concentration in the organic phase. Assuming the general extraction equilibrium:
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Separation of thorium, uranium, and rare earths from a
2020-11-1 Solvent extraction preferentially extracted uranium compared to thorium from the REE-containing solution. A two-stage solvent extraction process proved to be more efficient than the single-stage process, during the former process of which approximately 97%, 94%, and 43% of REEs, thorium, and uranium were recovered into the circuit product
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EXTRACTION OF URANIUM, THORIUM, AND ASSOCIATED
osti.gov journal article: extraction of uranium, thorium, and associated elements by monocarboxylic acids.
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Extraction of uranium, thorium and lanthanides using
The extraction behavior of uranium, thorium and lanthanides, represented by cerium and ytterbium, by Cyanex-923 has been investigated. The effect of different variables like the concentration of
Contact
Extraction of Thorium and Uranium from Chloride
2018-6-14 Extraction of Thorium and Uranium from Chloride Solutions by T ri-n-Butyl Phosphate and T ri-n-Octyl Phosphine Oxide Kenju WATANABE* Receivrd November 4, 1963 The extraction of thorium and uranium chlorides by TBP and TOPO was studied, The composition of complexes extracted from the chloride solutions of low acid concentration was established
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Selective extraction of thorium from uranium and rare
2020-10-29 Thorium Uranium Rareearth Separation ABSTRACT developing simple and effective extraction technique based on solid materialishighlydesirable[23–25].Intheliteratureseveralsolidad-sorbents such as polymers [26–30], porous silicas [31,32], porous
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SEPARATION OF THORIUM FROM URANIUM BY
@article{osti_4235978, title = {SEPARATION OF THORIUM FROM URANIUM BY EXTRACTION}, author = {Bohlmann, E G}, abstractNote = {A method is presented for the recovery and separation of uranium and thorium values contained in an aqueous nitric acid solution which is more than 3 M in nitric acid. The uranium and thorium containing solution
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(PDF) Extraction of Uranium and Thorium from Nitric Acid
extraction of uranium and thorium from nitric a cid solution 1897 0.5 M nitric acid followed by increase in D values for all ILs. However,in n -dodecane, both of UO 2 2 + and Th 4 + are hardly
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Aqueous biphasic extraction of uranium and thorium from
1995-7-1 The U.S. Department of Energy's Office of Scientific and Technical Information
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Selective Extraction of Thorium from Uranium and Rare
2019-10-21 In this work, a COF (covalent organic framework) adsorbent, namely [NH 4] + [COF-SO 3-] was prepared for selective extraction of thorium from uranium, and rare earth elements. The selective adsorption towards Th(IV) is reflected on the large distribution coefficient ( K d ) of 1.34×10 5 mL/g, the big difference up to two orders of magnitude in the adsorption capacity,
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Co-extraction of uranium and thorium NASA/ADS
The advantages of a complete solvent extraction route for the recovery of uranium and thorium. How to increase income from a uranium leach plant.
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Code APE / NAF 0721Z Extraction de minerais d'uranium
Code APE / NAF 0721Z Extraction de minerais d'uranium et de thorium. Le code APE NAF 0721Z est unique et implique des droits et obligations spécifiques. A ce jour, 1 sociétés sont immatriculées sous ce code qui concerne essentiellement des foreurs, des ouvriers, des techniciens, des géomètres et des ingénieurs.
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