Selective Removal of Thorium and Iron from Selective Hydrochloric Acid Leach Solution of Bastnaesite by Solvent Extraction Using Cextrant 230

被引：0

作者：

Su J. ^{[1
,2
]}

Kuang W. ^{[2
]}

Kuang S. ^{[2
,3
]}

Liao W. ^{[1
,2
,3
]}

机构：

[1] Department of Chemistry and Chemical Engineering, Nanchang University, Nanchang

[2] Institute of Materials and Chemistry, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou

[3] State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2023年 / 41卷 / 01期

关键词：

Cextrant; 230; iron; rare earths; removal; solvent extraction; thorium;

D O I：

10.11785/S1000-4343.20230114

中图分类号：

学科分类号：

摘要：

The extraction and separation of thorium，iron and trivalent rare earths from the selective hydrochloric acid leach solution of bastnaesite using di （2-ethylhexyl）［N-（2-ethylhexyl）amino methyl］phosphonate（Cextrant 230，abbreviated as L）were investigated. Cextrant 230 can extract thorium（IV）and iron（III）but hardly trivalent rare earths in chloride medium. The extracted complexes were determined to be ThCl4·4L and HFeCl4· L. Thermodynamic parameters（ΔH，ΔG and ΔS）were calculated and the extraction of Fe（III）by Cextrant 230 is an endothermic process，while the extraction of Th（IV）was barely affected by temperature. The loading capacities of 0.4 mol∙L-1 Cextrant 230 for Th（IV）and Fe（III）from chloride solutions with 0.28 mol∙L-1 HCl were determined to be 0.013 and 0.12 mol∙L-1，respectively. The loaded Th（IV）and Fe（III）can be stripped and separated by 1.0 mol∙L-1 HNO3 and distilled water. By 3 stages of cross-flow extraction on the selective hydrochloric acid leach solution of bastnaesite，the concentrations of thorium and iron decrease obviously from 65 and 5069 mg∙L-1 to 0.03 and 42.56 mg∙L-1，respectively. © 2023 Chinese Society of Rare Earths. All rights reserved.

引用

页码：178 / 186

页数：8

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