稀碱洗涤法去除混合碳酸稀土中SO_4^(2-)和Al杂质

Removal of SO_4^(2-) and Al Impurities from Mixed Rare Earth Carbonate by Washing with Dilute Alkali

用稀的氢氧化钠溶液对混合碳酸稀土进行洗涤,有效地除去大部分杂质SO42-和Al,分别讨论了碱的用量对SO42-和Al去除率的影响,得到了SO42-和Al去除率分别为大于99%和70%。

Mixed rare earth carbonate was washed by dilute sodium hydroxide solution and most of SO42-and Al2O3 impurities was effectively removed.Influence of alkali volume on elimination rate of SO42-and Al is discussed.It was proved that elimination ratio of SO42-and Al was larger than 99% and 70% respectively.