Extraction of rare earth elements from hydrate-phosphate precipitates of apatite processing

2nd International Symposium on Fundamental Aspects of Rare-earth Elements Mining and Separation and Modern Materials Engineering

材料科学;物理学

Andropov, M.O.^1,2 ; Anufrieva, A.V.^1 ; Buynovskiy, A.S.^1 ; Makaseev, Y.N.^1 ; Mazov, I.N.^1,2 ; Nefedov, R.A.^1,2 ; Sachkov, V.I.^1,2 ; Stepanova, O.B.^2 ; Valkov, Av^1

Seversk Technological Institute of National Research Nuclear University MEPhl, Tomsk

634050, Russia^1

Siberian Physical-Technical Institute of Tomsk State University, Tomsk

634050, Russia^2

关键词: Concentrated solution;    Extraction method;    Nitrate solutions;    Nitric acid technology;    Salting-out agents;    Stable solutions;    Technical decision;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/112/1/012001/pdf
DOI  :  10.1088/1757-899X/112/1/012001

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The features of extraction of rare earth elements (REE) were considered from hydrate-phosphate precipitates of REE of apatite processing by nitric acid technology. The preliminary purification of nitrate solution of REE from impurities of titanium, aluminum, iron, uranium and thorium was suggested to obtain stable solutions not forming precipitates. Washing the extract was recommended with the evaporated reextract that allows to obtain directly on the cascade of REE extraction the concentrated solutions suitable for the separation into groups by the extraction method. Technical decisions were suggested for the separation of REE in groups without the use of salting-out agent.