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Tripathi, V.M.; Suresh Kumar, K.; Sreekumar, G.; Sugilal, G., E-mail: ksuresh@barc.gov.in
Proceedings of the seventh DAE-BRNS biennial symposium on emerging trends in separation science and technology2016
Proceedings of the seventh DAE-BRNS biennial symposium on emerging trends in separation science and technology2016
AbstractAbstract
[en] In nuclear fuel cycle, current methodology for Pu reconversion involves Pu(IV)-oxalate precipitation as a semi continuous/batch process mode for a predetermined volume of Pu(NO_3)_4 solution in a long single column with a marine propeller type stirrer. In this process the slurry is being drained from bottom of the vessel leading to a possibility of accumulation of precipitate in the vessel which is an unfavorable condition for continuous process. As continuous reconversion process is a requirement to meet high through put of reprocessing plants, the conventional process has to be improvised with reference to its slurry exit point through overflow line. Although marine propeller type stirrer ensures an axial flow, it is not a choice for uniform solid suspension in a reactor vessel. A better alternate for complete suspension of solid in tall reactor is pitched blade turbine. Moreover pitched blade impellers are effective in low bottom clearance which ensures a thorough mixing of reactants. Present study focuses on feasibility of pitched blade impeller for mixing of reactants in a continuous actinide oxalate precipitation reactor with over flow line
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Source
Deb, A.C. (ed.) (Fuel Chemistry, Bhabha Atomic Research Centre, Mumbai (India)); Sodaye, Suparna; Murali, M.S.; Mohapatra, P.K. (Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai (India)) (eds.); Banerjee, Tamal (ed.) (Indian Institute of Technology Guwahati, Guwahati (India)); Ramakumar, K.L. (ed.) (Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai (India)); Association of Separation Scientists and Technologists, Mumbai (India); Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati (India); 280 p; 2016; p. 44; SESTEC-2016: 7. DAE-BRNS biennial symposium on emerging trends in separation science and technology; Guwahati (India); 17-20 May 2016; 1 ref., 3 figs., 1 tab.
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AbstractAbstract
[en] The reduction of ceric ammonium nitrate by anhydrous ammonia has been studied. The reaction yields cerous ammonium nitrate complex. This is an easy method to prepare an anhydrous Ce (III) salt, suitable for synthesis of organo cerium (III) derivatives
[fr]
La reduction du nitrate cerique ammoniacal par l'ammoniac anhydre a ete etudiee. La reaction conduit a la formation d'un nitrate cereux ammoniacal. Il s'agit d'une voie de synthese de sels anhydres de cerium (III) facile a mettre en oeuvre et pouvant eventuellement conduire par la suite a la preparation de derives organiques du cerium trivalentOriginal Title
Synthese du nitrate de cerium (III) ammoniacal par reduction du nitrate de cerium (IV) ammoniacal par l'ammoniac anhydre
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Journal Article
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Comptes Rendus des Seances de l'Academie des Sciences, Serie 2; ISSN 0249-6305;
; CODEN CRSUD; v. 307(20); p. 2021-2026

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[en] Oxophilicity of cerium(IV) ammonium nitrate (CAN) can be controlled by addition of hydrogen peroxide and such a control has been utilized to prepare 3-aroyl-2-aryl-4H-1-benzopyran-4-ones 2a-d from 3-arylidene-2-aryl-2,3-dihydro-4H-1-benzopyran-4-ones 1a-d in good yields
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[en] A process for preparing a rare earth nitrate solution in which rare earth hydroxides containing quadrivalent cerium are dissolved in nitric acid with the addition of hydrogen peroxide. The change in oxidation-reduction E.M.F. may be used to control the addition of peroxide to prevent formation of quadrivalent cerium ions in the nitrate solution
Original Title
Patent
Primary Subject
Source
4 Nov 1980; v p; US PATENT DOCUMENT 4,231,997/A/; U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50
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Patent
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AbstractAbstract
[en] The title compound is converted into the cyclic ethers 5 and the alcohol 6 upon treatment with ceric ammonium nitrate in acetone. Using methanol as a solvent the dimethoxy derivative 9 and the nitrate ester 10 are formed. No cross cycloaddition is observed in the presence of olefins such as ethyl vinyl ether, DMAD, or indene; however, with cyclopentadiene as co-reagent a mixture of the exo-endo Diels-Alder adducts 14 involving the vinylic system of 1 as 2π component is obtained. The results are rationalized through the intermediacy of the radical cation 1.+, generated by single electron transfer (SET) from the neutral precursor 1 to Ce(IV)
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Siqueira, M.L. de; Rapp, R.E.
Proceedings of the 13. National Meeting on Condensed Matter Physics1990
Proceedings of the 13. National Meeting on Condensed Matter Physics1990
AbstractAbstract
[en] Published in summary form only
Original Title
Um termometro de CMN para temperaturas muito baixas
Primary Subject
Source
Almeida Fonseca, A.L. de (Brasilia Univ., DF (Brazil)); Koiler, B. (Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)); Brescansin, L.M. (Universidade Estadual de Campinas, SP (Brazil)) (and others); Sociedade Brasileira de Fisica, Rio de Janeiro, RJ (Brazil); 284 p; 1990; p. 97; 13. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 8-12 May 1990; Available from the Library of the Comissao Nacional de Energia Nuclear, RJ, Brazil
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Miscellaneous
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Chane-Ching, J.Y.
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1986
Societe des Usines Chimiques Rhone-Poulenc, 94 - Vitry-sur-Seine (France)1986
AbstractAbstract
[en] The compound of formula Ce Mx (OH)y (NO3)z where M is an alkaline metal or a quaternary ammonium compound, 0.05 < x < 0.2, 0.4 < z <0.7 and y = 4 + x - z is claimed. It is prepared by reaction of a basic compound and a colloidal dispersion of a cerium IV compound
[fr]
Le compose de cerium IV repond a la formule Ce(M)x (OH)y (NO3)z dans laquelle - M represente un metal alcalin ou un radical ammonium quaternaire - x est compris entre 0,05 et 0,2 - y est tel que y = 4-z + x - z est compris entre 0,4 et 0,7. Ledit compose a la propriete d'etre aisement dispersable dans l'eauOriginal Title
Nouveau compose de cerium IV et son procede de preparation; basic cerium nitrates
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Source
26 Dec 1986; 20 Jun 1985; 23 p; FR PATENT DOCUMENT 2583736/A/; FR PATENT APPLICATION 8509374; Available from Institut National de la Propriete Industrielle, Paris (France); Application date: 20 Jun 1985
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Patent
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AbstractAbstract
[en] A straightforward and effective procedure for the preparation of 1,4- bis (triphenylphosphonium) butane cerium nitrate (BTPBCN) and its application as a selective oxidizing agent for oxidation of alkyl-substituted benzenes to their relating acylbenzenes in very good to high yields is reported. (author)
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Journal Article
Journal
Journal of the Chemical Society of Pakistan; ISSN 0253-5106;
; v. 38(5); p. 944-947

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AbstractAbstract
[en] Short note, 13 refs
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No abstract available
Original Title
Vliyanie shchelochnykh dobavok, solej metallov peremennoj valentnosti, ikh okislov na protsess okisleniya α-nesyshchennykh al'degidov naduksusnoj kislotoj
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Source
Deposited article; for English translation see the journal Russ. J. Phys. Chem.
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Journal Article
Journal
Zhurnal Fizicheskoj Khimii; v. 50(8); p. 2174
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