A new diphosphonic acid extractant N,N-n-octylamine di(methylene phenylphosphinic acid) for extraction and separation of zirconium and hafnium in hydrochloric acid

Nuclear grade zirconium and hafnium are the key to promoting the development of nuclear industry. We designed and synthesized a new diphosphonic acid extractant N , N - n -octylamine di(methylene phenylphosphinic acid) (OADMPPA) with excellent extraction ability and priority for extraction of zircon...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2020-04, Vol.324 (1), p.339-348
Main Authors: Zhao, Jialin, Sui, Ying, Peng, Xiujing, Sun, Guoxin, Cui, Yu
Format: Article
Language:English
Subjects:
Cation exchanging
Chemical tests and reagents
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Energy minerals
Fossil fuels
Hadrons
Hafnium
Heavy Ions
Hydrochloric acid
Industrial development
Inorganic Chemistry
Methylene
Nuclear Chemistry
Nuclear energy
Nuclear industry
Nuclear Physics
Physical Chemistry
Solvation
Zirconium
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Summary:Nuclear grade zirconium and hafnium are the key to promoting the development of nuclear industry. We designed and synthesized a new diphosphonic acid extractant N , N - n -octylamine di(methylene phenylphosphinic acid) (OADMPPA) with excellent extraction ability and priority for extraction of zirconium. This paper focused on the changes in extraction mechanisms and composition of complexes. With increasing concentration of HCl, cation exchange mechanism gradually changed into solvation mechanism, and complexes converted in the order of ZrOA, Zr(HA) 2 Cl 2 and ZrCl 4 ·H 2 A. Compared with bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex272), OADMPPA could increase the extraction rates of zirconium and hafnium by 7.2 and 12.6 times. Graphic abstract
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-020-07039-2