Improved separation of Ce, La, and Nd from a concentrate of rare-earth hydroxide via fractional precipitation

2nd International Conference on Current Progress in Functional Materials 2017

Haritsah, I.^1 ; Adi, W.A.^2 ; Purwani, M.V.^3 ; Manaf, A.^1

Materials Science Graduate Program, Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok

16424, Indonesia^1

Centre for Science and Technology of Advanced Materials, National Nuclear Energy Agency (BATAN), Kawasan Puspiptek Serpong, Banten

15314, Indonesia^2

Center for Science and Technology of Accelerator, National Nuclear Energy Agency (BATAN), Jl. Babarsari Caturtunggal, Sleman, Yogyakarta

55281, Indonesia^3

关键词: Ammonia solution;    Fractional precipitation;    Indonesia;    Industrial scale;    Nitric acid solutions;    Oxidizing agents;    Potassium bromate;    Rare earth hydroxide;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012013/pdf
DOI  :  10.1088/1757-899X/496/1/012013

来源: IOP

【 摘 要 】

In this report, we describe the selective and effective separation of Ce, La, and Nd rare-earth (RE) elements from the concentrate of a RE hydroxide (REOH) feedstock. The separation steps included dissolving the feedstock into a nitric acid solution and oxidizing the solution with potassium bromate (KBrO3) as an oxidizing agent to enable precipitation under the addition of sodium hydroxide (NaOH). The yellow precipitates consisted of a concentrate of Ce precipitates, and the filtrate contained La and Nd. The adjustment of the pH of the filtrate to 8.5 with ammonia solution led to the precipitation of Nd and an La concentrate in the filtrate. The developed method was demonstrated to be selective and adequate for the qualification separation of Ce, La, and Nd. This study demonstrates the identification and analysis of REOH from PTBGN-BATAN, Indonesia, and can be used as a reference for further processing at both the laboratory and industrial scale.