RARE EARTH ELEMENT ADSORPTION SEPARATION MATERIAL

WIPO Patent Application WO/2016/047700

A1

　The purpose of the present invention is to provide an adsorption separation material enabling selective adsorption of a rare earth element, and exhibiting excellent adsorption and recovery performance using a simplified device and operation. This adsorption separation material selectively recovers a rare earth element dissolved in an aqueous solution, wherein at least one diglycol amide acid-type ligand represented by the following general formula (2) is bonded to a polymer substrate by graft polymerization. (In formula (2): R represents a hydrogen atom, a C1-3 alkyl group, a C1-3 alkylene group, a C1-2 acyl group, or an aldehyde group; and * represents a bond).

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MURAKI YUZO (JP)
HIGUCHI HIROYUKI (JP)
NISHIGAWARA MASAYA (JP)
OGATA TSUYOSHI (JP)
NARITA KOICHI (JP)
TANAKA MIKIYA (JP)

PCT/JP2015/076960

March 31, 2016

September 24, 2015

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NITTO DENKO CORP (JP)
NAT INST OF ADVANCED IND SCIEN (JP)

C22B59/00; B01D15/00; B01J20/26; B01J20/34; C22B3/24; C22B7/00

WO2014157225A1

2014-10-02

JP2014148738A	2014-08-21
JP2013163861A	2013-08-22

TAKESHI OGATA ET AL.: "Immobilization of Diglycol Amic Acid on Silica Gel for Selective Recovery of Rare Earth Elements", CHEMISTRY LETTERS, vol. 43, no. 9, 23 May 2014 (2014-05-23), pages 1414 - 1416, XP055419969
See also references of EP 3199650A4

Eikoh Patent Firm, P. C. et al. (JP)
Patent business corporation glory patent firm (JP)

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