Study on preparation and application of novel saponification agent for organic phase of rare earths extraction

In view of the problem of ammonia-nitrogen wastewater pollution in rare earths extraction and separation, the novel saponification agent of organic phase, which is magnesium bicarbonate solution, was prepared with the natural rich and cheap dolomite as raw material through carbonation process. The b...

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Bibliographic Details
Published in:Journal of rare earths 2012-09, Vol.30 (9), p.903-908
Main Authors: FENG, Zongyu, HUANG, Xiaowei, LIU, Hongji, WANG, Meng, LONG, Zhiqi, YU, Ying, WANG, Chunmei
Format: Article
Language:English
Subjects:
ammonium-free
carbonation
extraction and separation
rare earths
saponification agent
分离过程
制备
应用
废水污染
皂化
碳化过程
稀土元素
萃取有机相
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Summary:In view of the problem of ammonia-nitrogen wastewater pollution in rare earths extraction and separation, the novel saponification agent of organic phase, which is magnesium bicarbonate solution, was prepared with the natural rich and cheap dolomite as raw material through carbonation process. The behavior and purification of main impurities ions in the carbonation process as well as the application effect of the novel saponification agent in the extraction and separation was researched. The results showed that the concentration of Fe, A1, Si im- purities ions was.less than 5 ppm in the saponification agent through the development of effective removal technology, respectively. When the novel saponification agent was used in the extraction and separation, magnesium utilization rate was more than 95%, and rare earths extrac- tion rate above 99.5% has achieved. Therefore, the technology could replace ammonia-water to saponify the organic phase in rare earth ex- traction and separation process.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60152-5