We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Separation of Adjacent Light Rare Earth Elements Using Silica Gel Modified with Diglycolamic Acid.
- Authors
Ogata, Takeshi; Narita, Hirokazu
- Abstract
The separation of adjacent rare earth elements (REEs) is a challenging issue due to their chemical similarity. We have investigated the separation of adjacent REEs using four types of adsorbents consisting of silica gel modified with diglycolamic acid with different functional groups at the amide position. For all the adsorbents, the adsorption ratio of REEs increased with the increase in atomic number from La to Sm and then became constant for heavy REEs. Among them, EDASiDGA, an adsorbent containing secondary and tertiary amides, showed a high separation factor for Nd/Pr of 2.8. The EDASiDGA-packed column was tested for individual recovery of Pr, Nd, and Sm. After the adsorption of these REEs from 0.10 M HCl, desorption tests were performed with 0.32 and 1.0 M HCl. As a result, Pr and Nd were eluted separately with 0.32 M HCl, and Sm was recovered with 1.0 M HCl. Since the EDASiDGA-packed column showed excellent separation of Pr/Nd/Sm without any chelating agent, it is promising for practical use.
- Subjects
RARE earth metals; SILICA gel; CHELATING agents; ATOMIC number; FUNCTIONAL groups; AMIDES
- Publication
Materials (1996-1944), 2024, Vol 17, Issue 11, p2648
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma17112648