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US 12,643,089 B2Granted
Adsorbent particles, method for producing adsorbent particles, base material particles, filling column, and method for recovering rare earth element
OwnerMasahiro Aoshima, Yohei Ishikawa +1inventors
InventorsMasahiro Aoshima, Yohei Ishikawa, Masato Miyatake
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Abstract
Adsorbent particles including: porous carrier particles containing an organic polymer; polyethylenimine attached to a surface of the porous carrier particles; and a diglycolic acid residue bonded to an amino group of the polyethylenimine. A most frequent pore size of the porous carrier particles exceeds 10 nm.
Claims16
Adsorbent particles comprising:
- porous carrier particles comprising an organic polymer;
- polyethylenimine attached to a surface of the porous carrier particles;
- and
- a diglycolic acid residue bonded to an amino group of the polyethylenimine,
- wherein a most frequent pore size of the porous carrier particles exceeds 10 nm,
- a pore volume of the porous carrier particles is 5.0 mL/g to 30 mL/g, and
- an amount of an amino group in the adsorbent particles is 0.1 to 100 mmol per 1 g of the adsorbent particles.
4 more elements
A method for producing adsorbent particles, the method comprising:
- preparing base material particles comprising porous carrier particles containing an organic polymer and polyethylenimine attached to a surface of the porous carrier particles;
- and
- bonding diglycolic acid or an anhydride thereof to an amino group of the polyethylenimine to form adsorbent particles,
- wherein a most frequent pore size of the porous carrier particles exceeds 10 nm,
- a pore volume of the porous carrier particles is 5.0 mL/g to 30 mL/g, and
- an amount of an amino group in the adsorbent particles is 0.1 to 100 mmol per 1 g of the adsorbent particles.
3 more elements
Base material particles comprising:
- porous carrier particles containing an organic polymer;
- and
- polyethylenimine attached to a surface of the porous carrier particles,
- wherein a most frequent pore size of the porous carrier particles exceeds 10 nm,
- a pore volume of the porous carrier particles is 5.0 mL/g to 30 mL/g, and
- an amount of an amino group in the base material particles is 0.1 to 100 mmol per 1 g of the base material particles.
3 more elements
Dependencies are inferred from the claim text.