Extraction and separation of scandium from waste acid from zirconium smelting

被引：0
|
作者：
Zhu G.-X. [1 ]
Song J. [2 ,3 ]
Tao D.-P. [1 ]
Qu J.-K. [2 ]
Meng L. [2 ,3 ]
Qi T. [2 ,3 ]
机构：
[1] Faculty of Metallurgical and Energy Engineering, Kunming University of Technology, Kunming
[2] National Engineering Research Center for Green Recycling of Strategic Metal Resources, Institute of Process, Chinese Academy of Sciences, Beijing
[3] Ganjiang Innovation Research Institute, Chinese Academy of Sciences, Ganzhou
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 02期
关键词：
extraction; high acidity; solvation; waste acid; zirconium smelting;
D O I：
10.11817/j.ysxb.1004.0609.2021-42599
中图分类号：
学科分类号：
摘要：
The mother liquor of zirconium oxychloride with high concentration of scandium has high value of recovery. Herein, the extraction processes of scandium from waste acidic mother liquor of zirconium oxychloride with different extractants were compared and the synergistic extraction mechanisms were studied. The Fourier-transform infrared (FT-IR) spectrometer was used to characterize the structure of the extractive materials. Furthermore, the process of stripping scandium with sodium hydroxide as the stripping agent was studied. The results show that the extraction system composed of P204+TBP has outstanding selectivity for scandium extraction. The extraction of zirconium by P204 and TBP is based on solvation mechanism in hydrochloric acid with high acidity. Using 1% P204+2% TBP+3% isooctanol+kerosene as extractant, the extraction rate reaches 99.7% by three-stage countercurrent extraction with O/A ratio of 2/3 at 293 K. The removal rate of zirconium achieves 98.2% when phosphoric acid is used to selectively remove zirconium. © 2023 Central South University of Technology. All rights reserved.
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页码：577 / 589
页数：12
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