【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...更多还原

【Abstract】 The phase diagrams of Na₂CrO₄- （NH₄）₂CrO₄-H₂O 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 NaNH₄Cro₄· 2H₂O formed in the system, which will decrease the purity of （NH₄）₂CrO₄ Consequently, a method is found to separate the fixture of ammonium chromate and double salt by analysing the phase diagrams.更多还原