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AbstractAbstract
[en] In this colloquium on solvent extraction are examined extractants, new solvents, counter-current contactors, columns hydrodynamics, practical applications, emulsions, membranes and high pressure processes for metal extraction, wastewater treatment, chemical separation etc. Only 8 papers are related to the nuclear field
[fr]
Au cours de ce colloque sur l'extraction par solvants sont examines: extractants, nouveaux solvants, extracteurs a contre-courant, hydrodynamique des colonnes, applications pratiques, emulsions, membranes et procedes haute pression pour l'extraction des metaux, le traitement des eaux, les separations chimiques etc... Seuls 8 exposes portent sur des applications nucleairesOriginal Title
Actes du colloque: extraction par solvant et echange d'ions
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Source
1985; 504 p; Institut du Genie Chimique; Toulouse (France); Colloquium on solvent extraction and ion exchange; Toulouse (France); 5-7 Jun 1985
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Conference
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Meddour, Laaldja
Ministere de l'Enseignement Superieur et de la Recherche Scientifique, Algiers (Algeria)1996
Ministere de l'Enseignement Superieur et de la Recherche Scientifique, Algiers (Algeria)1996
AbstractAbstract
[en] Many methods of TOPO synthesis are known in the litterature. Neverthless, the purification methods still unknown or quite known. In this work, we have proposed to develop a new method of purification and we have used the extraction properties of TOPO. This method consist to extracting the molybdene with TOPO in acid medium
Original Title
Purification de l'oxyde de tri-n-octyl phosphine par extraction liquide liquide
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Source
Apr 1996; 6 p
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Report
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AbstractAbstract
[en] Twelve chapters review various aspects of solvent extraction, from fundamental theory to practical aspects. One chapter, on use in the nuclear industry, is included as a separate item. (author)
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Source
Ellis Horwood Series in Analytical Chemistry; 1988; 221 p; Ellis Horwood Ltd; Chichester (UK); ISBN 0-7458-0303-2;
; Price Pound 30.00

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Book
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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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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
Record Type
Patent
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Zarpelon, L.M.C.; Nobre, J.S.M.; Paschoal, O.A.
Associacao Brasileira de Metais, Sao Paulo, SP (Brazil)1990
Associacao Brasileira de Metais, Sao Paulo, SP (Brazil)1990
AbstractAbstract
[en] Published in summary form only
Original Title
Estudo de separaco zirconio-hafnio no sistema MIBK-HSCN-HCl
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Source
1990; 1 p; 14. National Meeting of Mineral and Hydrometallurgy Treatment; Salvador, BA (Brazil); 13-16 May 1990
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Miscellaneous
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Conference
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AbstractAbstract
[en] From extraction experiments and γ-activity measurements, the extraction constants corresponding to the general equilibrium M+(aq) + 1 · Cs+(nb) ↔ 1 · M+(nb) + Cs+(aq) taking part in the two-phase water-nitrobenzene system (1 = hexaarylbenzene-based receptor; M+ = H3O+, NH4+, Ag+, K+, Rb+, Tl+; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complex species in nitrobenzene saturated with water were calculated; they were found to increase in the series of Rb+ < K+ < Ag+, Tl+ < H3O+, NH4+. (author)
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48 refs.
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Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 287(2); p. 497-500

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AbstractAbstract
[en] Several diamide derivates were synthesized in our laboratory. The extraction of actinides and some fission products by these compounds were studied. N,N,N',N'-tetra-(2-ethylhexyl)-3- oxa-pentanediamide (TEHOPDA) has been proven to be a suitable extractant for actinides removal from nitric acid solution. The actinides can be stripped from the loaded solvent by the dilute nitric acid. TEHOPDA showed a high loading capacity to actinides and lanthanides with a mixture of n-octanol and kerosene as the diluent. Considering the extraction and stripping of actinides, 25 mol/L TEHOPDA - 30% n-octanol + 70% kerosene was selected as the solvent. A cascade extraction experiment was carried out with the simulated dissolution of spend fuel as feed. 99.996% U and 99.999% Am, Pu, and Np were extracted in a 4-stage test.
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Source
The organizing committee of APSORC05, Beijing (China); 360 p; 2005; p. 256; 3. asia-pacific symposium on radiochemistry; Beijing (China); 17-21 Oct 2005; Available form China Nuclear information Centre (China Institute of Nuclear Information and Economics)
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Miscellaneous
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AbstractAbstract
[en] The dynamics of the Ce distribution in a nonequilibrium extraction process are investigated. Results are presented for the extraction of Ce by tributylphosphate in organic diluents from an aqueous solution in which a Belousov-Zhabotinskii oscillating reaction is occurring. The time dependences of [Ce] in the organic phase of the oscillatory extraction system that are synchronous with the redox-potential dependences are obtained for the first time. The effect of the initial concentrations of Ce, oxidant, and organic substrate on the principal parameters of the oscillatory extraction, such as the frequency, amplitude, etc., is found. A conclusion is made about the ability to control an oscillatory extraction process
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Translated from Radiokhimiya; 36: No. 3, 256-262(May-Jun 1994).
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Journal Article
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Translation
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AbstractAbstract
No abstract available
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Journal Article
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Talanta; v. 21(10); p. 1013-1024
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AbstractAbstract
[en] From extraction experiments and γ-activity measurements, the exchange extraction constants corresponding to the general equilibrium M2+(aq) + SrL2+ (nb ↔ ML2+(nb) + Sr2+ (aq) taking place in the two-phase water-nitrobenzene system (M2+ = Ca2+, Ba2+, Pb2+, Cd2+; L = hexaethyl calix[6]arene hexaacetate; aq = aqueous phase, nb nitrobenzene phase) were evaluated. Moreover, the stability constants of the ML2+ complexes in nitrobenzene saturated with water were calculated; they were found to increase in the following order: Cd2+ < Ca2+ < Sr2+ < Pb2+ < Ba2+. (author)
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74 refs.
Record Type
Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 287(3); p. 899-902

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