Synthesis of Enriched 10B Boric Acid of Nuclear Grade  

作　　者：Zhang Lei 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China [2]Chemical Engineering Research Center,Tianjin University,Tianjin 300072,China

出　　处：《Transactions of Tianjin University》2014年第6期458-462,共5页天津大学学报（英文版）

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

摘　　要：An economic and effective method of preparing enriched 10B boric acid was established by chemical reactionof enriched 10BF3 and CaCO3. A process of boron trifluoride reacting with water was investigated under certainconditions. Calcium carbonate was selected to counteract hydrofluoric acid followed on. Some key operation factorswere investigated, such as temperature, reaction time and the ratio of CaCO3 to 10BF3. The results showed that the yieldof enriched 10B boric acid could reach 97. 2% and the purity was up to 94. 1% under the following conditions： the temperaturewas 50-60,℃, the reaction time was 28 h and the ratio of CaCO3 to 10BF3 was 4. In addition, after recrystallizationand titration analysis, the purity of the product could reach over 99. 2% from 94.1%.An economic and effective method of preparing enriched 10 B 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 10 B boric acid could reach 97. 2% and the purity was up to 94. 1% under the following conditions: the temperature was 50—60,℃, 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%.

关 键 词：enriched 10B boric ACID BORON TRIFLUORIDE CALCIUM CARBONATE fluoboric ACID hydrogen FLUORIDE 

分 类 号：G4[文化科学—教育学]