Preparation of Cerium-rich Rare Earth Oxide Nanoparticles from Bastnaesite Concentrate

DOI

10.2991/mmeceb-15.2016.38How to use a DOI?

Keywords

bastnaesite, alkali fusion, ceria nanoparticles, the grade of cerium oxide, the grade of rare earth oxides

Abstract

Cerium-rich rare earth oxides nanoparticles were extracted from bastnaesite concentrate by first leaching, alkali fusion with NaOH, and second leaching process. The effects of the hydrochloric acid concentration, mass ratio of solid to liquid, leaching temperature of the leaching process and the NaOH amount, roasting temperature and roasting time of alkali fusion process were systematically studied by X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD) and transmission electron microscope (TEM) analysis. The optimum parameters of the leaching process were 2 mol L-1 HCl solution, solid to liquid mass ratio 1: 5 and 75 oC, respectively. Non- rare earth impurities could be effectively removed by roasting the first sludge with 30wt. % NaOH . The grade of total rare earth oxides and the purity of CeO2 in the final product were 96.99% and 78.73%, respectively, which were improved by 10.62% and 5.73% than that of one step leaching. The cerium-rich rare earth oxides powder showed a major phase of ceria, with particle size distribution of 20~100nm according to TEM.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qianchen Liu
AU  - Li Zhang
AU  - Kehui Qiu
AU  - Qiang Feng
AU  - Xilu Hou
AU  - Yunlei Bu
AU  - Chun Hu
PY  - 2015/12
DA  - 2015/12
TI  - Preparation of Cerium-rich Rare Earth Oxide Nanoparticles from Bastnaesite Concentrate
BT  - Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
PB  - Atlantis Press
SP  - 187
EP  - 193
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmeceb-15.2016.38
DO  - 10.2991/mmeceb-15.2016.38
ID  - Liu2015/12
ER  -