Effect of Irradiation on the Dynamics of Gas Evolution in Thermal Oxidation of Diamide Extractants in F-3 Diluent
- 6 Downloads
The dynamics of gas evolution in thermal oxidation of solutions of 2,2'-bipyridine-6,6'-dicarboxylic acid di(N-ethyl-4-hexylanilide) (DYP-7), 2,6-pyridinedicarboxylic acid di(N-ethyl-4-fluoroanilide) [Et(pFPh)· DPA], and 2,2'-bipyridine-6,6'-dicarboxylic acid di(N-ethyl-4-ethylanilide) (DYP-9) in m-nitrobenzotrifluoride (F-3) diluent with 14 M HNO3 in open and closed vessels was studied. The effect of preliminary irradiation of the organic phase on the kinetics of thermolysis of the two-phase system was determined. Heating of the irradiated samples in a closed vessel (autoclave) leads to the pressure buildup, with the pressure reached increasing from 18 to 23 atm as the absorbed dose is increased from 0 to 1 MGy. The exothermic processes occurring in the systems caused a 4 to 10°С increase in the sample temperature. The thermal stability of all the irradiated diamide–F-3 diluent extraction systems studied is acceptable for practical use.
Keywordsm-nitrobenzotrifluoride diamides of 2,6-pyridinedicarboxylic and 2,2'-bipyridine-6,6'-dicarboxylic acids extraction system irradiation thermolysis gas evolution
Unable to display preview. Download preview PDF.
- 7.Rodin, A.V., Nazin, E.R., Zachinyaev, G.M., et al., Vopr. Radiats. Bezopasn., 2011, no. 3, pp. 45–50.Google Scholar
- 8.Nazin, E.R. and Zachinyaev, G.M., Pozharovzryvobezoasnost’ tekhnologicheskikh protsessov radiokhimicheskikh proizvodstv (Fire and Explosion Safety of Industrial Radiochemical Processes), Moscow: Nauchno-Tekh. Tsentr po Yadernoi i Radiatsionnoi Bezopasnosti, 2009, pp. 106–116.Google Scholar
- 9.GOST (State Standard) 12.1.044-89: Fire and Explosion Safety of Substances and Materials. List of Parameters and Methods for Their Determination.Google Scholar