Preparation and characterization of neodymium hydroxide powder via the hydration method

doi:10.1016/j.cjche.2020.04.018

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (7): 1973-1980.DOI: 10.1016/j.cjche.2020.04.018

• Materials and Product Engineering • Previous Articles Next Articles

Preparation and characterization of neodymium hydroxide powder via the hydration method

Hongxi Li, Chenggong Xu, Qishan Yang

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

Received:2020-02-15 Revised:2020-04-09 Online:2020-08-31 Published:2020-07-28
Contact: Qishan Yang
Supported by:
The authors gratefully acknowledge the financial support for this study by the Natural Science Foundation of Inner Mongolia (CN) (2016ZD05).

Preparation and characterization of neodymium hydroxide powder via the hydration method

Hongxi Li, Chenggong Xu, Qishan Yang

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

通讯作者: Qishan Yang
基金资助:
The authors gratefully acknowledge the financial support for this study by the Natural Science Foundation of Inner Mongolia (CN) (2016ZD05).

Abstract

Abstract: The preparation of Nd(OH)₃ powder by the direct hydration method using Nd₂O₃ as a raw material was studied, and the effects of stirring mode, H₂O and Nd₂O₃ molar ratio, stirring rate, and reaction time on temperature change and conversion rate in a hydration system were analyzed. The reasonable process conditions for the direct hydration of Nd(OH)₃ by Nd₂O₃ were then determined. Process, morphology, and structure were considered in the preparation of neodymium hydroxide powder, and its composition was investigated by X-ray powder diffraction, scanning electron microscopy, laser particle size analysis, thermogravimetric differential thermal analysis, and chemical analysis. It has been proved that the process is simple and feasible, in line with the concept of modern green chemistry, and the products also meet the market requirements.

Key words: Hydration method, Neodymium hydroxide, Powder preparation, Influencing factor, Green chemical engineering

摘要： The preparation of Nd(OH)₃ powder by the direct hydration method using Nd₂O₃ as a raw material was studied, and the effects of stirring mode, H₂O and Nd₂O₃ molar ratio, stirring rate, and reaction time on temperature change and conversion rate in a hydration system were analyzed. The reasonable process conditions for the direct hydration of Nd(OH)₃ by Nd₂O₃ were then determined. Process, morphology, and structure were considered in the preparation of neodymium hydroxide powder, and its composition was investigated by X-ray powder diffraction, scanning electron microscopy, laser particle size analysis, thermogravimetric differential thermal analysis, and chemical analysis. It has been proved that the process is simple and feasible, in line with the concept of modern green chemistry, and the products also meet the market requirements.

关键词: Hydration method, Neodymium hydroxide, Powder preparation, Influencing factor, Green chemical engineering

Hongxi Li, Chenggong Xu, Qishan Yang. Preparation and characterization of neodymium hydroxide powder via the hydration method[J]. Chinese Journal of Chemical Engineering, 2020, 28(7): 1973-1980.

Hongxi Li, Chenggong Xu, Qishan Yang. Preparation and characterization of neodymium hydroxide powder via the hydration method[J]. 中国化学工程学报, 2020, 28(7): 1973-1980.

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Preparation and characterization of neodymium hydroxide powder via the hydration method

Preparation and characterization of neodymium hydroxide powder via the hydration method

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