Citation: LIU Chuanying, CHEN Ji, DENG Yuefeng. Extraction of Scandium from Sulfuric Solution by Cyanex 923 and the Comparison with P507 and Naphthenic Acid[J]. Chinese Journal of Applied Chemistry, ;2018, 35(12): 1492-1496. doi: 10.11944/j.issn.1000-0518.2018.12.180057 shu

Extraction of Scandium from Sulfuric Solution by Cyanex 923 and the Comparison with P507 and Naphthenic Acid

a.
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: CHEN Ji, jchen@ciac.ac.cn
Received Date: 5 March 2018
Revised Date: 26 March 2018
Accepted Date: 5 June 2018

Fund Project: the National Natural Science Foundation of China 51174184the National Basic Research Program of China 2012CBA01202Supported by the National Natural Science Foundation of China(No.51174184), the National Basic Research Program of China(No.2012CBA01202)

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The recovery of scandium(Sc) is difficult due to its low content in resources and large amount of other metals associated with. To solve this problem, the extraction, separation and stripping of Sc by three extractants:trialkyl phosphine oxides(Cyanex 923), 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester(P507) and naphthenic acid, were compared in this article. The Cyanex 923 can efficiently extract Sc from a highly acidic solution. The P507 and naphthenic acid have high extraction efficiency of Sc in low acidic solution. The best acidity for the separation between Sc and zirconium(Zr), Sc and titanium(Ti) by Cyanex 923 is 1 mol/L. The separation ratios of Sc/Zr and Sc/Ti are 5.6 and 10.6, respectively. The largest separation ratios of Sc/Zr and Sc/Ti by P507 are 21 and 59.7, respectively, at an acidity of 2 mol/L. Though the P507 has a higher separation ratio, the loaded Sc on P507 is hard to be stripped by acid. Only the Sc loaded on Cyanex 923 can be efficiently stripped when the acidity of stripping acid is 0.4 mol/L. Taking account of both separation and stripping, the Cyanex 923 is more suitable to separate and recover Sc from the leaching liquor of secondary resources.
- scandium,
- extraction,
- trialkyl phosphine oxides,
- ethylhexyl phosphonic acid mono-ethylhexyl ester,
- naphthenic acid
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沈阳化工大学材料科学与工程学院沈阳 110142