Effect of impurity ions on preparation of novel saponifier for rare earth extraction

被引：2

作者：

Xiao Yanfei ^{[1
]}

Feng Zongyu ^{[1
]}

Huang Xiaowei ^{[1
]}

Huang Li ^{[1
]}

Xu Yang ^{[1
]}

Hou Yongke ^{[1
]}

Wang Meng ^{[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 / 09期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

rare earths; magnesium bicarbonate; saponifier; carbonation; impurity ions;

D O I：

10.1016/S1002-0721(12)60377-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Magnesium bicarbonate, prepared by the carbonation of magnesium hydroxide slurry, was used as a novel saponifier to eliminate the ammonia nitrogen pollution in the rare earth extraction separation process. The effect of impurity ions introduced by system on the carbonation reaction of magnesium hydroxide was studied in the work. The results showed that the presence of Ca2+ could lead to side reactions so as to reduce the conversion rate of magnesium hydroxide, and a small number of rare earth ions would have great influence on the carbonation reaction. What's more, there was no influence on carbonation reaction with the low concentration of Na+ or Mg2+, the conversion rate of magnesium hydroxide could reach above 96%. This paper showed a practical theory which could provide scientific guidance for the preparation of novel saponifier in rare earth extraction separation process.

引用

页码：905 / 910

页数：6

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