Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—<italic style="font-style: italic">iso</italic>-octanol synergistic system

Zhang Ziyun; Zhang Yanlin; Shen Wenyu; Guo Dapeng; Wang Hongbo; Wang Duo; Zhou Fang; Yang Chao

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Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system

Updated：2026-03-13

- Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system
- Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system
- 中国化学工程学报（英文） 2026年89卷第1期页码：198-207
- Affiliations：
  
  School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430074, China
  Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  Corresponding authors. E-mail addresses: wangduo@ipe.ac.cn(D. Wang),
  fzhou@wit.edu.cn(F. Zhou).
- Funds：
  
  The authors acknowledge the financial support from the Na-tional Natural Science Foundation of China Regional Innovation and Development Joint Fund(U24A20557);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDC0230403);the National Natural Science Foundation of China(22378393;22208356);"Hundred Talents Program" of the Chinese Academy of Sciences; the Chinese Academy of Sciences stably supports the youth team plan in the field of basic research(YSBR-038);and Key Research & Development projects in Qinghai Province .(2023-HZ-805)
- DOI：
  中图分类号：
- 收稿：2025-05-26，
  
  修回：2025-08-15，
  
  录用：2025-08-15，
  
  网络首发：2025-10-23，
  
  纸质出版：2026-01
- Accepted：
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Zhang Ziyun, Zhang Yanlin, Shen Wenyu, 等. Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system[J]. 中国化学工程学报（英文）, 2026,89(1):198-207.

Zhang Ziyun, Zhang Yanlin, Shen Wenyu, et al. Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 198-207.
Zhang Ziyun, Zhang Yanlin, Shen Wenyu, 等. Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system[J]. 中国化学工程学报（英文）, 2026,89(1):198-207. DOI：

Zhang Ziyun, Zhang Yanlin, Shen Wenyu, et al. Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system[J]. Chinese Journal of Chemical Engineering, 2026, 89(1): 198-207. DOI：

摘要

Abstract

This article presents a new synergistic extraction system composed of Cyanex 272 (C272

bis(2

4-trimethylpentyl)phosphinic acid) and

iso

-octanol for Sc

separation. The proposed synergistic system possessed an Sc

extraction efficiency of 93.5% and a back-extraction efficiency of 82.7%

with selectivity coefficients of ßSc/Fe =459 and ßSc/Al =4241

which are considerably higher as compared to the current extraction systems. The extraction mechanism was studied and interpreted. The enhanced extraction efficiency is attributed to the increased hydrophobicity of the ternary complex

whereas the back-extraction efficiency can be ascribed to the attenuated stability of the complex. C272 and C272—

iso

-octanol systems also possess considerable surface activity

which is beneficial for the phase separation in solvent extraction. Based on the solvent extraction results

a preliminary study was conducted on polymer inclusion membranes (PIMs) using the binary system for Sc

separation to avoid the formation of the third phase

achieving an optimal initial flux of PIM of 6.71 × 10

- 4

mol·m

- 2

·h

- 1

. Our results provide valuable information on highly efficient Sc

separation

and the study on PIM extraction has shown a green alternative to solvent extraction.

关键词

Keywords

references

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Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system

Highly enhanced scandium extraction and back-extraction efficiencies using a new C272—iso-octanol synergistic system

DOI：

摘要

Abstract

关键词

Keywords

references