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Composite Resins Impregnated by Phosphorus Organic Extractants for Separation of Rare Earth Elements from Nitrate-Based Leachate of Permanent Magnetsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Kovalenko O.V., Baulin V.E., Shulga Yu M., Baulin D.V., Gutsev G.L., Tsivadse A.Yu
- Журнал: Materials
- Том: 16
- Год издания: 2023
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 6614
- Последняя страница: 6635
- DOI: 10.3390/ma16196614
- Аннотация: Composite resins impregnated by different organophosphorus extractants were developed and used for extraction chromatography recovery of rare earth elements from nitrate-based leachate of NdFeB permanent magnet. The influence of different factors on recovery of Nd(III) and Fe(III), as the most difficult to separate elements, by developed resins was studied. The influence of extractant structure, composition of feed solutions, and concentrations of HNO3 and NH4NO3 on recovery of Fe(III) and Nd(III) by prepared resins were considered. The best recovery of Nd(III) was shown by resin impregnated with N,N-dioctyl (diphenylphosphoryl) acetamide. For this material, sorption characteristics (values of the distribution coefficient, capacity, and the Nd(III)/Fe(III) separation factor) were obtained, and the reproducibility of loading-stripping process was evaluated. This resin and its precursors were characterized by IR spectroscopy. It was found that the developed resin is more efficient for Nd(III) recovery than resin impregnated with TODGA. An effective approach to the Nd(III)/Fe(III) separation with developed resin in nitrate solution was proposed. This approach was used for recovery of Pr(III), Nd(III), and Dy(III) from nitrate-based leachate of NdFeB magnet by the developed resin. The final product contained 99.6% of rare earths.
- Добавил в систему: Коваленко Ольга Васильевна