TY - JOUR
T1 - Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin
AU - Arai, Tsuyoshi
AU - Wei, Yuezhou
AU - Kumagai, Mikio
AU - Horiguchi, Kenichi
N1 - Funding Information:
This work was financed by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). The authors gratefully acknowledge the ministry's permission to publish this work.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/2/9
Y1 - 2006/2/9
N2 - To separate rare earths in nitric acid medium by anion exchange process, a novel silica-based macro-reticular anion exchange resin (SiPyR-N4) with pyridinium as functional group has been synthesized. It was found that the SiPyR-N4 resin exhibits a quite strong adsorption for some rare earths especially the light rare earth elements such as La, Ce, Pr, Nd and Pm whose distribution coefficients onto SiPyR-N4 reach 10-25 dm3/kg-resin, which are much higher than the reported values for these elements with conventional anion exchange resins. The results from the column experiments show that the rare earths can be separated into the three groups: light, moderate and heavy rare earths and, a perfect separation between La-Pr group and Sm-Gd group can be achieved.
AB - To separate rare earths in nitric acid medium by anion exchange process, a novel silica-based macro-reticular anion exchange resin (SiPyR-N4) with pyridinium as functional group has been synthesized. It was found that the SiPyR-N4 resin exhibits a quite strong adsorption for some rare earths especially the light rare earth elements such as La, Ce, Pr, Nd and Pm whose distribution coefficients onto SiPyR-N4 reach 10-25 dm3/kg-resin, which are much higher than the reported values for these elements with conventional anion exchange resins. The results from the column experiments show that the rare earths can be separated into the three groups: light, moderate and heavy rare earths and, a perfect separation between La-Pr group and Sm-Gd group can be achieved.
KW - Metals
KW - Molecule
KW - Polymers
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U2 - 10.1016/j.jallcom.2004.11.092
DO - 10.1016/j.jallcom.2004.11.092
M3 - Conference article
AN - SCOPUS:31344457542
SN - 0925-8388
VL - 408-412
SP - 1008
EP - 1012
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
T2 - Proceedings of the Rare Earths'04 in Nara, Japan
Y2 - 7 November 2004 through 12 November 2004
ER -