胡天琦^1,2,张志宏¹,董欧阳¹,马艳芳¹,赵冬梅¹,张永明¹,王健康^1,2

• 1:中国科学院 青海盐湖研究所青海省盐湖资源化学重点实验室，青海 西宁 810008
• 2:中国科学院大学，北京 100049

摘要(Abstract)：

研究了25、40、55℃条件下软钾镁矾和氯化钾转化结晶硫酸钾的过程，针对不同时刻液相和固相进行化学分析及鉴定；结果表明，氯化钾溶解速率大于软钾镁矾的溶解速率；硫酸钾结晶发生迅速。软钾镁矾的溶解速率随温度升高而增大，氯化钾溶解速率随着温度升高变化不明显；硫酸钾结晶速率也随着温度升高而增大，但收率随着温度的增加而减少；采用非线性拟合计算出系列温度条件下，硫酸钾结晶的量以及软钾镁矾和氯化钾溶解量与时间的关系。结合动力学模型模拟计算，得到溶解和结晶动力学方程，得出反应速率常数和反应级数，运用Arrhenius公式计算溶解和结晶的活化能；提出了溶解及结晶转化机理。

关键词(KeyWords)： 软钾镁矾;硫酸钾;动力学;相图

Abstract:

Keywords:

基金项目(Foundation): 高新技术研究与发展计划（2012-G-212A）；青海省科技支撑项目（2013-G-139A）。

作者(Author): 胡天琦^1,2,张志宏¹,董欧阳¹,马艳芳¹,赵冬梅¹,张永明¹,王健康^1,2

DOI: 10.3969/j.issn.1003-9015.2017.03.004

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