Study on non-saponification extraction process for rare earth separation

被引：35
|
作者：
Xiao Yanfei [1 ]
Long Zhiqi [1 ]
Huang Xiaowei [1 ]
Feng Zongyu [1 ]
Cui Dali [1 ]
Wang Liangshi [1 ]
机构：
[1] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2013年 / 31卷 / 05期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
magnesia; non-saponification; solvent extraction; rare earths;
D O I：
10.1016/S1002-0721(12)60311-1
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The purpose of this study was to overcome the disadvantages of ammonia-nitrogen wastewater pollution and high cost of sodium saponification in rare earth separation process. The study focused on the non-saponification extraction technology with magnesia. The influences of the content and particle size of magnesia, reaction time, reaction temperature, and O/A on cerium extraction rate were also discussed. The results showed that the hydrogen ions of extractant were exchanged by rare earth ions when organic extractant and rare earth solution were mixed with magnesia powder, and then the exchanged hydrogen dissolved magnesia to make the acidity of the system stable. The magnesium ions were not participated in the extraction reaction. Non-saponification extraction process of rare earth had been realized. The cerium extraction rate could reach up to 99% in single stage within the optimal reaction conditions.
引用
收藏
页码：512 / 516
页数：5
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