US 12,364,967 B2
Adsorbent particles, method for producing adsorbent particles, base material particles, filling column and method for recovering rare earth element
Masahiro Aoshima, Tokyo (JP); Yohei Ishikawa, Tokyo (JP); and Masaru Watanabe, Tokyo (JP)
Appl. No. 17/609,404
Filed by Resonac Corporation, Tokyo (JP)
PCT Filed Feb. 25, 2020, PCT No. PCT/JP2020/007499
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/225964, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 2019-089254 (JP), filed on May 9, 2019.
Prior Publication US 2022/0219139 A1, Jul. 14, 2022
Int. Cl. B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/34 (2006.01); C02F 1/28 (2023.01); C02F 101/10 (2006.01); C02F 101/20 (2006.01)
CPC B01J 20/265 (2013.01) [B01J 20/26 (2013.01); B01J 20/28016 (2013.01); B01J 20/30 (2013.01); B01J 20/3085 (2013.01); B01J 20/34 (2013.01); B01J 20/3475 (2013.01); C02F 1/285 (2013.01); B01J 2220/445 (2013.01); B01J 2220/58 (2013.01); C02F 2101/10 (2013.01); C02F 2101/20 (2013.01); C02F 2303/16 (2013.01); Y02P 10/20 (2015.11)] 9 Claims
OG exemplary drawing
 
1. Adsorbent particles for recovering a rare earth element, each of the adsorbent particles comprising:
a carrier particle containing an organic polymer;
an amino group-containing polymer adhered to a surface of the carrier particle; and
a diglycolic acid residue bonded to the amino group of the amino group-containing polymer,
wherein the amino group-containing polymer comprises polyethyleneimine, polylysine, or a mixture thereof and has a molecular weight of 200 or more and 10,000 or less, and
wherein the diglycolic acid residue interacts with and adsorbs the rare earth element to be recovered.