摘要
铬盐工业是无机盐工业的一个主要分支,其主要产品有重铬酸钠、铬酸酐、铬酸铵、氧化铬等,广泛用于合金材料、电镀、制革、印染、橡胶等部门,是国民经济中重要的基础化工原料工业.铬盐生产系先将铬铁矿制成铬酸钠及重铬酸钠,然后再进一步加工制成其它铬盐产品.在铬盐...
The phase diagrams of Na_2CrO_4- (NH_4)_2CrO_4-H_2O system at 20℃ and 50℃ have been determined by solubility method. The experimental results have also been verified by mathematical method. The phase diagrams show that there is a double salt of NaNH_4Cro_4· 2H_2O formed in the system, which will decrease the purity of (NH_4)_2CrO_4 Consequently, a method is found to separate the fixture of ammonium chromate and double salt by analysing the phase diagrams.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2000年第1期70-75,共6页
Acta Physico-Chimica Sinica
基金
中国科学院"九.五"资源环境特别支持项目!KZ95T.05
关键词
相图
分离
铬酸铵
复盐
铬酸钠
相平衡
<Keyworys>Phase diagram, Separation, Ammonium chromate, Double salt