期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 217, 期 -, 页码 294-298出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2019.02.006
关键词
Diglycolamide; Extraction; Separation; Pr(III); Fe(III)
资金
- National Natural Science Foundation of China [21876062]
- Natural Science Foundation of Shandong Province [ZR2015BM030]
A systematic structural separation study was carried out for the separation of Pr(III) and Fe(Ill) from nitric acid medium with unsymmetrical diglycolamides (DGAs). Four kinds of diglycolamides, N,N'-di-methyl-N,N'-di-dodecyl diglycolamide (DMDDdDGA), N,N'-di-ethyl-N,N'-di-dodecyl diglycolamide (DEDDdDGA), N,N'-di-propyl-N,N'-di-dodecyl diglycolamide (DPDDdDGA) and N,N'-di-butyl-N,N'-di-dodecyl diglycolamide (DBDDdDGA) with different alkyl substituent were synthesized and characterized. The effect of the structure of extractant on the separation of iron and praseodymium was studied. A high separation coefficient of Pr(III) and Fe(III) was obtained by DMDDdDGA in a wide range of nitric acid concentration, which shows good application prospect in the recovery and purification of rare earth.
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