Selective Extraction of Hafnium over Zirconium with Dialkylphosphinic Acids from H 2 SO 4 Media

Journal of the Brazilian Chemical Society

article

Wang, Junlian¹  Liu, Hui¹  Xu, Wen¹  Chang, Ziyong¹  Wang, Peilong¹  Wang, Huajun¹ 

[1] University of Science and Technology Beijing

关键词: zirconium;    hafnium;    solvent extraction;    separation;    dialkylphosphinic acids;   

DOI  :  10.21577/0103-5053.20230014

学科分类：内科医学

来源: SciELO

【 摘 要 】

Designing highly efficient dialkylphosphinic acid extractant for zirconium/hafnium separation relies on systematic structure-property studies. In this paper, dialkylphosphinic acids with different substituents at β-C, γ-C and δ-C for zirconium and hafnium extraction and separation from H2SO4 H), the weaker extraction ability of the dialkylphosphinic acids. The zirconium and hafnium separation behavior is related to the extraction ability of dialkylphosphinic acids. Dialkylphosphinic acids with stronger extraction ability show better zirconium/hafnium separation performance at higher acidity of 2.0 mol L-1 H2SO4, while those with weaker extraction ability show better zirconium and hafnium separation performance at lower acidity of 0.25 mol L-1 H2SO4. The highest hafnium/zirconium separation factor (βHf/Zr) in the current study occurs with (2-ethylhexyl)(2,4,4-trimethylpentyl)phosphinic acid (USTB-1), which reaches 19.2.

【 授权许可】

CC BY