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2000•Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and AtomsRequires access

Removal of H_2C_2O_4 Using HNO_3 Oxidation Method

Yi Guo

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Abstract

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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What this paper is about

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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Available abstract

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).

Key concepts: Stripping (fiber), Chemistry, Catalysis, Nuclear chemistry, Oxidation process, Inorganic chemistry, Materials science, Organic chemistry

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