铝对草酸法生产混合稀土氧化物的影响

Effect of Aluminium on the Preparation of Mixture of Rare Earth Oxide by Using Oxalic Acid

本文研究了用草酸法从离子型稀土矿的浸出液中得到混合稀土氧化物时,杂质铝的影响。找到稀土、铝、草酸根等离子间的定量关系。得到随着铝含量的增加,要使稀土定量沉淀,必须加入过量草酸的规律。这是由于草酸沉淀稀土过程中 Al^(3+)·Re^(3+)和 C_2O_4^(2-)离子间形成了复杂的溶解性较大的配合物所致。

This paper investigated the effect of aluminium existing in lixivium ofrare earth mineral on preparation of mixture of rare earth oxide by usingoxalic acid to treat the lixivium of ionic rare earth mineral and elucidatedquantitatively the correlation among Al^(3+),Re^(3+)and C_2O_4^(2-).It was found thatoxalic acid must be added excessively when the concentration of Al^(3+)in-creases and that is why Al^(3+),Re^(3+)and C_2O_4^(2-)-formated a complicated com-plex with greater solubility.