高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (11): 1232.

• 研究论文 • 上一篇    下一篇

硫酸钾水溶液亚稳区性质的研究(Ⅱ)——杂质对结晶过程的影响

王子忱, 赵秋刚, 张丽华, 太秀玉, 杨永华, 赵慕愚   

  1. 吉林大学化学系, 130023
  • 收稿日期:1988-11-07 出版日期:1990-11-24 发布日期:1990-11-24
  • 通讯作者: 王子忱
  • 基金资助:

    国家自然科学基金

A Study of the Characteristic of Metastable Zone of the Aqueous K2SO4 Solution (Ⅱ)——The Effect of Impurities on the Crystallization Process of K2SO4 Solution

Wang Zichen,Zhao Qiugang, Zhang Lihua, Tai Xiuyu, Yang Yonghua, Zhao Muyu   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1988-11-07 Online:1990-11-24 Published:1990-11-24

摘要: 研究了10种不同杂质对硫酸钾水溶液亚稳区宽度的影响,计算了在杂质存在条件下体系成核特征值的变化。结果表明,三价离子Cr3+、Fe3+、Al3+使亚稳区明显加宽;二价离子Cu2+、Zn2+、Mn2+、Mg2+使亚稳区变窄;而一价离子Li+、NH4+、Na+则分别使亚稳区变宽、变窄、不变。

关键词: 杂质影响, 亚稳区, 硫酸钾水溶液, 结晶

Abstract: The effects of 10 different ions on the metastable zone width and the nucleation characteristic parameters of aqueous K2SO4 solution are investigated. It is observed that the metastable zone widths are increased in the presence of Li+,Cr3+,Al3+,Fe3+ and decreased in the presence of Cu2+, Zn2+,Mn2+, Mg2+ and do not greatly change in the presence of Na+ and NH4+. The influence of impurities on the metastable zone width may be the result of their effects on the specific surface energy σ12, the nucleation energy △G(r*) and the rate of crystal growth.

Key words: Effect of impurity, Metastable zone, Aqueous solution of K2SO4, Crystallization

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