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Synthesis of enriched 10B boric acid of nuclear grade

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An economic and effective method of preparing enriched 10B boric acid was established by chemical reaction of enriched 10BF3 and CaCO3. A process of boron trifluoride reacting with water was investigated under certain conditions. Calcium carbonate was selected to counteract hydrofluoric acid followed on. Some key operation factors were investigated, such as temperature, reaction time and the ratio of CaCO3 to 10BF3. The results showed that the yield of enriched 10B boric acid could reach 97.2% and the purity was up to 94.1% under the following conditions: the temperature was 50–60 °C, the reaction time was 28 h and the ratio of CaCO3 to 10BF3 was 4. In addition, after recrystallization and titration analysis, the purity of the product could reach over 99.2% from 94.1%.

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Correspondence to Jiao Xu  (徐 姣).

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Supported by the Independent Innovation Fund of Tianjin University (No. 1307).

Zhang Lei, born in 1983, male, doctorate student.

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Zhang, L., Zhang, W., Xu, J. et al. Synthesis of enriched 10B boric acid of nuclear grade. Trans. Tianjin Univ. 20, 458–462 (2014).

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