郭宏飞,郭宝曼,张菁,豆帅勇,曹吉林

• 1:河北省绿色化工与高效节能重点实验室河北工业大学化工学院

摘要(Abstract)：

针对白钠镁矾矿产资源的加工开发,提出以硫酸铵做盐析剂分离白钠镁矾制备镁氮复肥和硫酸钠的设想,采用等温法测定了35℃时Na2SO4-Mg SO4-(NH4)2SO4-H2O四元体系的溶解度,并依据相平衡数据绘制了相图。该相图存在4个共饱点和6个结晶区,6个结晶区分别是Mg SO4·7H2O结晶区,Mg SO4·Na2SO4·4H2O复盐结晶区,Na2SO4结晶区,Na2SO4·(NH4)2SO4·4H2O复盐结晶区,(NH4)2SO4结晶区,以及Mg SO4·(NH4)2SO4·6H2O复盐结晶区,其中Mg SO4·(NH4)2SO4·6H2O的结晶区最大,表明该复盐Mg SO4·(NH4)2SO4·6H2O易于结晶析出。依据相图分析和计算,设计了白钠镁矾矿和(NH4)2SO4为原料制备氮镁复肥和十水硫酸钠的新工艺,新工艺具有生产母液不需蒸发水分,显著节能的优点。

关键词(KeyWords)： 白钠镁矾;相平衡;硫酸镁;硫酸铵;氮镁复肥

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21076057)

作者(Author): 郭宏飞,郭宝曼,张菁,豆帅勇,曹吉林

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