Na2SO4-MgSO4-(NH4)2SO4-H2O四元体系相图研究及其应用  

Study on the Phase Diagram of Na_2SO_4-MgSO_4-(NH_4)_2SO_4-H_2O System and Their Application

作　　者：巩学敏[1,2] 张嘉勇 曹吉林[1] 

机构地区：[1]河北工业大学化工学院,河北省绿色化工与高效节能重点实验室,天津300130 [2]华北理工大学,河北唐山063009

出　　处：《工业安全与环保》2016年第7期94-97,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(21076057)

摘　　要：根据不同温度下Na_2SO_4-MgSO_4-(NH_4)_2SO_4-H_2O四元体系相图的绘制,分析了该四元体系相图受温度影响的相图特征,设计了以硫酸铵为盐析剂加工分离白钠镁矾的最佳生产工艺。新工艺具有反应时间短,操作简单,可以生产得到氮镁复肥和无水硫酸钠等优点。此工艺对于克服白钠镁矾的加工分离困难,实现白钠镁矾资源的综合开发和利用具有重要的现实意义。Based on the phase diagram of Na2SO4-MgSO4-（NH4）2SO4-H2O quaternary system,the characteristics of the phase diagram affected by temperature is explained in detail. An optimum process is designed to separate bloedite using（ NH4）2SO4 as salting- out agent. The technology is fast to reach phases equilibrium,easy to operate,and can gain Mg- N compound fertilizers and anhydrous Na2SO4 directly. New process has a very important practical significance in exploiting and using bloedite comprehensively.

关 键 词：白钠镁矾 硫酸铵 盐析法 相图 

分 类 号：TS311[轻工技术与工程]