SEPARATION METHOD, SEPARATION AND PURIFICATION METHOD AND METHOD FOR PRODUCING RADIOISOTOPE, AND SEPARATION APPARATUS, SEPARATION AND PURIFICATION SYSTEM, AND ACCUMULATION DEVICE FOR SEPARATION AND PURIFICATION

WIPO Patent Application WO/2023/013672

A1

Provided is a separation and purification method comprising: a step (1) for adjusting a sample solution including a first metal ion, a second metal ion, and a chelating agent to a pH at which the second metal ion chelates to form a complex having a negative charge, while the first metal ion essentially does not chelate; a step (2-1) for bringing a solution containing the first metal ion and the chelated second metal ion obtained in step (1) into contact with a cation exchange body, and adsorbing the first metal ion in the solution on the cation exchange body to remove the first metal ion; a step (2-2) for obtaining a treated solution containing the chelated second metal ion, from which the first metal ion has been removed; and a step (3) for decomposing the chelating agent for the chelated second metal ion contained in the treated solution obtained in step (2-2), to obtain a purified second metal ion. This separation and purification method is suitable when the second metal is a radioisotope obtained by conversion from the first metal.

OHIRA SHIN-ICHI (JP)
TODA KEI (JP)
SUGO YUMI (JP)
MORI MASANOBU (JP)

PCT/JP2022/029769

February 09, 2023

August 03, 2022

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UNIV KUMAMOTO NAT UNIV CORP (JP)
NATIONAL INSTITUTES FOR QUANTUM SCIENCE AND TECH (JP)
UNIV NAT CORP KOCHI UNIV (JP)

G21G4/08; B01J39/05; B01J39/07; B01J39/09; B01J39/20; B01J39/22; B01J47/02; B01J47/14; B01J49/00; B01J49/20; C22B3/24

JPS63147504A	1988-06-20
JP2009288021A	2009-12-10
US5108615A	1992-04-28

MORI Hiroshi (JP)

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