New promising phosphorus-containing sorbents for rare earth metals

The copolymers of diallylaminotris(diethylamino)phosphonium tetrafluoroborate and chloride with acrylonitrile (DAAP-BF 4 -AN and DAAP-Cl-AN, respectively) have been prepared by free radical copolymerization. The sorption capacity of the copolymers toward La(III), Ce(III), Pr(III), Nd(III), Sm(III),...

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Bibliographic Details
Published inSeparation science and technology Vol. 60; no. 13; pp. 1694 - 1707
Main Authors Batueva, Tatiana, Gorbunova, Marina
Format Journal Article
LanguageEnglish
Published Taylor & Francis 02.09.2025
Subjects
Diallylaminophosphonium salts
light rare earth metals
radical copolymerization
sorption
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Summary:The copolymers of diallylaminotris(diethylamino)phosphonium tetrafluoroborate and chloride with acrylonitrile (DAAP-BF 4 -AN and DAAP-Cl-AN, respectively) have been prepared by free radical copolymerization. The sorption capacity of the copolymers toward La(III), Ce(III), Pr(III), Nd(III), Sm(III), and Gd(III) ions in sulfuric, hydrochloric, nitrate, and mixed (H 2 SO 4  + H 3 PO 4 ) media has been investigated. The DAAP-BF 4 -AN copolymer has higher efficiency in neutral media, with the DAAP-Cl-AN copolymer being more active in alkaline media. The both sorbents exhibit no activity toward lanthanum and neodymium ions in acidic medium. The kinetic regularities of the sorption process have been studied. The rate constants of external and internal diffusions have been calculated, with a high role of both external and internal diffusive processes shown.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2025.2526514