摘要
采用湿渣法测定了NH4Cl-CaCl2-H2O三元体系在25℃、50℃和75℃时的相平衡数据,并绘制了相图。结果表明,在25℃时,该体系相图存在NH4Cl和CaCl2.6H2O两个单结晶区、NH4Cl与CaCl2.6H2O共晶区。在50℃和75℃时,该体系相图存在NH4Cl、2NH4Cl.CaCl2.3H2O和CaCl2.2H2O三个单结晶区,NH4Cl与2NH4Cl.CaCl2.3H2O及2NH4Cl.CaCl2.3H2O与CaCl2.2H2O两个共结晶区。在该三元体系中首次发现了一种新的水合复盐2NH4Cl.CaCl2.3H2O。
The equilibrium data on the ternary system of NH4Cl- CaCl2 - H2O at 25 ℃, 50 ℃ and 75 ℃ were investigated by using the wet - residue method, and the phase diagrams of the system were plotted. The experimental results show that there are two pure phase crystal areas of NH4Cl and CaCl2 ·6H2O and their mixture phase crystal areas at 25 ℃, and there are three pure phase crystal areas of NH4Cl, 2NH4ClCaCl2·3H2O and CaCl2·2H2O, two mixture phase crystal areas of NH4Cl and 2NH4Cl·CaCl2 ·3H2O, and 2NH4Cl-CaCl2 ·3H2O and CaCl2·2H2O in the system at 50 ℃ and 75 ℃ A newhydration double salt （2NHCl· CaCl2· 3H2O） was found in the ternary equilibrium system for the first time.
出处
《化工矿物与加工》
CAS
北大核心
2010年第6期4-8,共5页
Industrial Minerals & Processing
基金
国家科技支撑计划项目(2006BAB03A10)
河北省自然科学基金项目(B2007000008)资助项目
关键词
氯化钙
氯化铵
相平衡
calcium chloride
ammonium chloride
phase equillbriurn
