Solvent Extraction Equilibria of Rare Earth Metals by Acidic Organophosphorus Extractants with Bulky Substituents
1995; Springer Nature; Volume: 11; Issue: 4 Linguagem: Inglês
10.2116/analsci.11.637
ISSN1348-2246
AutoresKeisuke Ohto, Sachiyo Yoshida, Kazuharu Yoshizuka, Katsutoshi Inoue, Masaru Ohtsuka, Masahiro Goto, Fumiyuki Nakashio,
Tópico(s)Chemical Synthesis and Characterization
ResumoTwo kinds of acidic organophosphonates with different bulky ester groups, 2-[p-(l,1,3,3-tetramethylbutyl)phenoxy]ethyl and p-(1, 1, 3, 3-tetramethylbutyl)phenyl groups, were synthesized to investigate their extraction behavior for nine kinds of rare earth elements from aqueous acidic nitrate media. The extraction reaction was discussed based on the slope analysis to evaluate the extraction equilibrium constants (Kex) for each metal ion and the separation factors (β). These extractants synthesized in the present work were found to possess stronger extractabilities for rare earth metals than commercial extractants like D2EHPA and PC-88A. Their separation efficiencies are also comparable with the commercial extractants mentioned above.
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