Crystallization Kinetics of H3BO3-Na2SO4-H2O System
[1]GONG Dianting,LI Fenghua,FAN Zhanguo,et al.Crystallization Kinetics of H3BO3-Na2SO4-H2O System[J].Journal of Zhengzhou University (Engineering Science),2009,30(01):82-86.
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
30
Number of periods:
2009 01
Page number:
82-86
Column:
Public date:
1900-01-01
- Title:
- Crystallization Kinetics of H3BO3-Na2SO4-H2O System
- CLC:
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- DOI:
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- Abstract:
- Boric acid was prepared by neutralizing borax by acidification of sulfuric acid, combined with recrystallization method and ion exchange resin method, which could improve the quality of boric acid products. The solution after neutralization reaction is mainly H3BO3-Na2SO4-H2O system, and the optimal experimental conditions for boric acid crystallization in the system are obtained through the experimental study of the crystallization kinetics of the system, which provides an experimental basis for the preparation of high-purity boric acid. Through the study of the factors influencing the crystallization process of boric acid in the system, it is found that the crystallization of boric acid is mainly affected by the supersaturation of the solution, crystallization temperature, crystallization time, stirring speed and impurities contained in the solution. Experiments show that for H3BO3-Na2SO4-H2O system, under the condition that other reaction conditions remain unchanged, the concentration increases and the crystallization time prolongs, and the appropriate crystallization temperature and stirring speed are conducive to boric acid crystallization. Compared with the H3BO3-H2O system, the Na3SO3 contained in the H2BO4-Na2SO2-H4O system inhibits the crystallization of boric acid. The crystallization kinetic curve of boric acid in H3BO3-Na2SO4-H2O system was obtained from the experimental data, and the crystallization kinetic equation was established.
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Last Update:
1900-01-01