US 12,280,357 B2
Adsorbent particles, base particle, packed column, and method for recovering rare-earth element
Masahiro Aoshima, Tokyo (JP); Yohei Ishikawa, Tokyo (JP); and Masaru Watanabe, Tokyo (JP)
Appl. No. 17/617,938
Filed by Resonac Corporation, Tokyo (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023134
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/251000, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-110463 (JP), filed on Jun. 13, 2019.
Prior Publication US 2022/0305457 A1, Sep. 29, 2022
Int. Cl. B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/32 (2006.01); B01J 20/34 (2006.01); C22B 3/24 (2006.01); C22B 59/00 (2006.01)
CPC B01J 20/261 (2013.01) [B01J 20/28057 (2013.01); B01J 20/3272 (2013.01); B01J 20/328 (2013.01); B01J 20/3475 (2013.01); C22B 3/24 (2013.01); C22B 59/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. Adsorbent particles, each comprising:
a carrier particle comprising an organic polymer comprising a monomer unit derived from a styrene-based monomer;
a hydrophilic organic compound adhered to a surface of the carrier particle; and
a diglycolic acid residue bonded to the hydrophilic organic compound,
wherein when a BET specific surface area of the adsorbent particles as determined by adsorption of nitrogen gas is X0 and a BET specific surface area of the adsorbent particles as determined by adsorption of water vapor is X1, X1/X0 is 0.10 to 1.0.