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为充分发挥稀土的经济效益,提高稀土元素的利用率,我们采用P507萃取,将稀土元素分离为轻、重两组,重稀土进入有机相,混合轻稀土氯化物留于水相。但在萃取调整酸度时,产生NH_4Cl(萃取原料中含NH_4Cl<3g/L,萃取后增加到30g/L以上)。因此必须以萃取后含NH_4Cl>30g/L的混合轻稀土水相作原料(以下简称原料),提取含RE_2O_3≥45％的固体轻稀土氯化物产品。如
In order to give full play to the economic benefits of rare earths and improve the utilization of rare earth elements, we use P507 extraction, the rare earth elements were separated into light and heavy two groups, heavy rare earth into the organic phase, mixed light rare earth chloride left in the aqueous phase. But in the extraction of acidity adjustment, produce NH_4Cl (extraction of raw materials containing NH_4Cl <3g / L, extraction increased to 30g / L or more). Therefore, it is necessary to extract the solid light rare earth chloride product containing RE_2O_3≥45% from the mixed light rare earth water phase containing NH_4Cl> 30g / L after the extraction (hereinafter referred to as the raw material). Such as