[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

[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

[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

[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

[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)

[en] Published in summary form only

[en] The compound of formula Ce M_x (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

[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)

[en] Short note, 13 refs

No abstract available