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GUO Yi fei,LIANG Jun fu,HUI Hong yan,SONG Chong li, JIAO Rong zhou,LIU Xiu qin (Institute of Nuclear Energy Technology, Tsinghua University, Beijing 102201, China). Removal of H_2C_2O_4 Using HNO_3 Oxidation Method[J]. Atomic Energy Science and Technology, 2000, 34(4): 359-359. DOI: 10.7538/yzk.2000.34.04.0359
Citation: GUO Yi fei,LIANG Jun fu,HUI Hong yan,SONG Chong li, JIAO Rong zhou,LIU Xiu qin (Institute of Nuclear Energy Technology, Tsinghua University, Beijing 102201, China). Removal of H_2C_2O_4 Using HNO_3 Oxidation Method[J]. Atomic Energy Science and Technology, 2000, 34(4): 359-359. DOI: 10.7538/yzk.2000.34.04.0359
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  • HNO 3 oxidation method for removal of H 2C 2O 4 from H 2C 2O 4 stripping solution in TRPO process is studied. 5.5～7.5 mol·L -1 HNO 3 0.30 mol·L -1 H 2C 2O 4 mixed solution is evaporated at 90 ℃ and H 2C 2O 4 can be decomposed and removed completely. After adding catalyst MnCO 3, the mixed solution is evaporated and distillated at 100 ℃,H 2C 2O 4 can be decomposed quickly. HNO 2 resulting from HNO 3 can oxidized Np(Ⅳ)to Np(Ⅴ)and Np(Ⅵ) while 95 % of Pu in the solution is as Pu(Ⅳ).
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