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AbstractAbstract
[en] The aqueous solution is contacted with an aminated compound of low solubility in water, for instance a trialkylamine, and the complex formed is separated. Application is made to the recovery of organic phosphorus compounds in effluent for reuse in uranium or plutonium extraction or for extraction of degradation products of TBP
[fr]
La solution aqueuse est mise en contact avec un compose amine peu soluble dans l'eau, p. ex. metrialkylamine, ou on separe le complexe forme. Le procede est applique a la recuperation des composes phosphores dans les effluents pour reutilisation dans l'extraction de l'uranium ou du plutonium ou pour extraire les produits de degradation du TBP avant rejetOriginal Title
Procede de recuperation de composes organophosphores acides et/ou d'ions organophosphate presents dans une solution aqueuse et son utilisation pour le traitement d'effluents aqueux
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Secondary Subject
Source
6 May 1988; 30 Oct 1986; 11 p; FR PATENT DOCUMENT 2606202/A/; FR PATENT APPLICATION 8615127; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 30 Oct 1986
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Patent
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AbstractAbstract
[en] HDEHP is used as the metal ion extractant in an extractive scintillator solution for the assay of alpha emitters. In this application it is necessary that the HDEHP be as color-free as possible to minimize quenching in the scintillator and as free of monoalkyl phosphoric acid and polyphosphates as possible. HDEHP was purified by various methods: copper precipitation, vacuum distillation, caustic scrubbing. The results are presented. (U.K.)
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Journal Article
Journal
Journal of Inorganic and Nuclear Chemistry; v. 38(11); p. 2127-2129
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Jensen, M. P.; Chiarizia, R.; Urban, V.; Nash, K. L.
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2001
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
No abstract available
Primary Subject
Source
18 Oct 2001; [vp.]; W-31-109-ENG-38; Available from Argonne National Lab., IL (US)
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Miscellaneous
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Han Hi Jong.
Ministry of Atomic Energy, Pyongyang (Korea, Democratic People's Republic of). Research Center for Atomic Energy1989
Ministry of Atomic Energy, Pyongyang (Korea, Democratic People's Republic of). Research Center for Atomic Energy1989
AbstractAbstract
[en] Reduction condition of Fe(III) to extract uranium and vanadium with HDEHP from sulphuric acid leaching liquors of uranium ore was examined. It was shown that in the system of oxidation-reduction consisted of many ionic pairs can reduce Fe(III) with iron scraps selectively and at this time factors affected on its reduction is hydro-ionic concentration in solution and diffusion factor. (Author)
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Source
Feb 1989; 9 p
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Report
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AbstractAbstract
[en] The extraction of uranium(VI) through a W/O/W liquid membrane containing DEHPA was studied in the counter transport system. The optimum stable conditions of W/O emulsion were determined; the optimum concentrations of surfactant span 80 and paraffine oil were 2 Vol. %, respectively. The extraction results showed that more than 95 % of uranium(VI) was extracted during 10 minutes when the carrier concentration was 4 Vol. %, internal aqueous phase; IN-Hsub(2)SOsub(4) solution, external aqueous phase; pH 2 and mixing speed; 350 rpm. (Author)
Record Type
Journal Article
Journal
Yonsei Engineering Report; CODEN SKWKA; v. 17(1); p. 17-23
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Sundar, P.S.
Westinghouse Electric Corp., Pittsburgh, Pa. (USA)1974
Westinghouse Electric Corp., Pittsburgh, Pa. (USA)1974
AbstractAbstract
[en] The separation of metal ions of groups II and III from uranium, in an aqueous solution containing uranyl ions is described. The method comprises the following steps: extracting the solution by means of a suitable solvent containing a reagent likely to react with the uranyl ion and provide a complex which is soluble in the solvent; mixing said solvent with an aqueous solution containing ammonium carbonate and/or di-carbonate in the proportion of from 0.5 to 1 mole per liter, sufficient amount of sulphite ions for causing the metal ions to precipitate; letting said solvent be separated from the aqueous solution; collecting the metal ion precipitate. That inexpensive method provides ceramic grade uranium, which can be used as reactor fuel
[fr]
On decrit un procede de separation de l'uranium d'ions metalliques des groupes II et III dans une liqueur aqueuse contenant des ions uranyle. Selon le procede: on extrait la liqueur avec un solvant convenable contenant un reactif susceptible de reagir avec l'ion uranyle en donnant un complexe soluble dans le solvant. On melange ce solvant a une solution aqueuse contenant de 0,5 a 1 mole/1 de carbonate et/ou bicarbonate d'ammonium, puis on met ce solvant au contact de suffisamment d'ions sulfure pour faire precipiter les ions metalliques. On laisse le solvant se separer de la solution aqueuse; et on recueille le precipite d'ions metalliques. Ce procede peu couteux fournit de l'uranium de qualite ceramique, utilisable comme combustible pour reacteurOriginal Title
Procede de separation d'uranium d'ions metalliques des groupes II et III
Primary Subject
Source
20 Aug 1974; 15 p; FR PATENT DOCUMENT 2241620/A/; Available from Institut National de la Propriete Industrielle, Paris (France); priority claim: 23 Aug 1973, USA.
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Patent
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Ambare, Dipali N.; Yadav, K.K.; Anitha, M.; Singh, D.K.; Kain, V., E-mail: dksingh@barc.gov.in
Proceedings of the sixth DAE-BRNS interdisciplinary symposium on materials chemistry2016
Proceedings of the sixth DAE-BRNS interdisciplinary symposium on materials chemistry2016
AbstractAbstract
[en] In the present paper an attempt has been made to separate dysprosium (Dy) from the chloride solution comparable to the scrap of Nd -Fe-B permanent magnet by solvent extraction technique. Di-2-ethyl hexyl phosphoricacid (D2EHPA) and 2-ethyl hexyl phosphoric acid (PC88A)have been evaluated as extractants under wide range of experimental variable. The two phase extraction reaction was found to be exothermic in nature for the both the extraction systems. D2EHPA was found to be superior compared to PC88A. Increase in metal ion concentration, aqueous acidity and temperature lead to decrease in distribution ratio for Dy extraction. Selective separation of Dy from mixed rare earth feed consisting of Dy, Nd and Pr was achieved with 0.25 M D2EHPA at feed acidity 0.5M HCL. The purity and recovery of Dy was found to be ∼98% and 95%respectively. (author)
Primary Subject
Source
Karmarkar, Gourab; Tyagi, Adish; Tyagi, Deepak (Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India)) (eds.) (and others); Society for Materials Chemistry, Mumbai (India); Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India); 332 p; ISBN 81-88513-76-8;
; Dec 2016; p. 95; ISMC-2016: 6. DAE-BRNS interdisciplinary symposium on materials chemistry; Mumbai (India); 6-10 Dec 2016

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Book
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Vijayalakshmi, R.; Singh, D.K.; Singh, H., E-mail: rvijaya@barc.gov.in
Proceedings of the DAE-BRNS symposium on nuclear and radiochemistry2013
Proceedings of the DAE-BRNS symposium on nuclear and radiochemistry2013
AbstractAbstract
[en] A two cycle solvent extraction process employing 2-ethyl hexyl, 2-ethyl hexyl phosphonic acid (EHEHPA) has been developed for the separation of high purity gadolinium. Intermediate rare earth concentrate obtained during samarium purification process, comprised of 70% gadolinium along with lighter rare earths (Sm, Nd) as well as heavier rare earths (Tb, Dy, Y) have been processed for obtaining >99.5 % gadolinium oxide. The oxide was subsequently converted to its nitrate form for use as a secondary shut down device in PHWR system. The experimental conditions were optimized using computer simulation and validated by bench scale counter-current operations. (author)
Primary Subject
Source
Tripathi, Rahul (ed.) (Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai (India)); Rama Rao, G.A. (ed.) (Product Developement Division, Bhabha Atomic Research Centre, Mumbai (India)); Tomar, B.S.; Ramakumar, K.L. (Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India)) (eds.); Govt. Model Science College, Rani Durgavati University, Jabalpur (India); Board of Research in Nuclear Sciences, Department of Atomic Energy, Mumbai (India); 677 p; 2013; p. 331-332; NUCAR 2013: 11. DAE-BRNS symposium on nuclear and radiochemistry; Jabalpur (India); 19-23 Feb 2013; 1 ref., 1 fig., 1 tab.
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AbstractAbstract
[en] We have investigated the extraction of cadmium with di(2-ethylhexyl) phosphoric acid (HDEHP) in various solvents from perchloric and phosphoric solutions. The distribution coefficient D obtained is not very dependent on the nature and the polarity of the diluent used. The extraction of Cd(II) by HDEHP dissolved in benzene, from sulfophosphoric solutions shows the absence of sulfuric or mixed sulfophosphoric complexes of the metal. However, the presence of iodide anions in aqueous perchloric or phosphoric media results in enhanced extraction coefficient of cadmium with HDEHP (HX) in benzene. The extracted species were found to be CdIX,3(HX)2 and CdI2,3(HX)2 and their formation constants are 0.033 and 0.036, respectively. The recovery of cadmium from phosphoric medium by tributylphosphate (TBP), trioctyl phosphine oxide (TOPO), triphenyl phosphine oxide (TPPO), diphenylamine or their mixtures with HDEHP is lesser than with HDEHP alone
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Source
S0969804300003419; Copyright (c) 2001 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: Belgium
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Journal Article
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Yadav, Kartikey K.; Singh, D.K.; Singh, H.; Varshney, Lalit, E-mail: hsingh@barc.gov.in
Proceedings of DAE-BRNS symposium on nuclear and radiochemistry. V. 12011
Proceedings of DAE-BRNS symposium on nuclear and radiochemistry. V. 12011
AbstractAbstract
[en] The extraction and stripping behaviour of rare earths namely yttrium(III) and neodymium(III) have been investigated employing a novel polysulfone based polymeric composite bead encapsulated with di-2-ethyl hexyl phosphoric acid (D2EHPA). Effects of experimental variables such as contact time, aqueous acidity, amounts of Y(III) and Nd(III), stripping agent etc have been studied on the separation of rare earths. Feasibility of separating Y(III) from Nd(III) has been established. Optical microscopic examination of the composite beads have been carried out. Regeneration and reusability of micro-porous beads have also been evaluated. (author)
Primary Subject
Source
Sawant, R.M. (ed.) (Radioanalytical Chemistry Div., Bhabha Atomic Research Centre, Mumbai (India)); Sali, S.K. (ed.) (Fuel Chemistry Div., Bhabha Atomic Research Centre, Mumbai (India)); Venkatesh, Meera (ed.) (Radiopharmaceuticals Div., Bhabha Atomic Research Centre, Mumbai (India)); Venugopal, V. (ed.) (Radiochemistry and Isotope Group, Bhabha Atomic Research Centre, Mumbai (India)); Board of Research in Nuclear Sciences, Department of Atomic Energy, Mumbai (India); 427 p; 2011; p. 202-203; NUCAR 2011: 10. symposium on nuclear and radiochemistry; Visakhapatnam (India); 22-26 Feb 2011; 2 refs., 2 figs.
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