[1]龚殿婷,李凤华,樊占国,等.H3BO3-Na2SO4-H2O体系结晶动力学研究[J].郑州大学学报(工学版),2009,30(01):82-86.[doi:10.3969/j.issn.1671-6833.2009.01.019]
　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.[doi:10.3969/j.issn.1671-6833.2009.01.019]

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H3BO3-Na2SO4-H2O体系结晶动力学研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

30卷

期数:

2009年01期

页码:

82-86

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Crystallization kinetics of H3BO3-Na2SO4-H2O system

作者:

龚殿婷; 李凤华; 樊占国; 等.

东北大学,材料与冶金学院,沈阳,110004, 东北大学,材料与冶金学院,沈阳,110004, 东北大学,材料与冶金学院,沈阳,110004, 东北大学,材料与冶金学院,沈阳,110004

Author(s):

Gong Dianting; LI Fenghua; Fan Zhanguo; etc

关键词:

硼酸;  结晶;  动力学;  高纯硼酸;  影响因素

Keywords:

Boric acid;  crystallization;  Dynamics;  High purity boric acid;  Influencing factors

DOI:

10.3969/j.issn.1671-6833.2009.01.019

文献标志码:

A

摘要:

采用硫酸酸化中和硼砂反应制备硼酸,并结合重结晶法与离子交换树脂法,可提高硼酸产品的质量.中和反应后的溶液主要为H3BO3-Na2SO4-H2O体系,通过对体系结晶动力学的实验研究,得出了体系中硼酸结晶的最优实验条件,为高纯硼酸的制备提供实验依据.通过对体系中硼酸结晶过程影响因素的研究发现,硼酸的结晶主要受溶液过饱和度、结晶温度、结晶时间、搅拌速度及溶液中所含杂质等因素影响.实验证明,对于H3BO3-Na2SO4-H2O体系,在其它反应条件不变的情况下,浓度增大,结晶时间延长,选取适当的结晶温度和搅拌速度有利于硼酸析晶.相对于H3BO3-H2O体系,H3BO3-Na2SO4-H2O体系中所含的Na2SO4抑制了硼酸的析晶.由实验数据得到H3BO3-Na2SO4-H2O体系中硼酸的结晶动力学曲线,并建立结晶动力学方程.

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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