	US 11,913,862 B2
	Core-shell particles, and method for separating and purifying substance to be separated using core-shell particles
Takahiro Kitagawa, Kyoto (JP); and Masumi Ueda, Kyoto (JP)
Assigned to SANYO CHEMICAL INDUSTRIES, LTD., Kyoto (JP)
Appl. No. 16/972,857
Filed by SANYO CHEMICAL INDUSTRIES, LTD., Kyoto (JP)
PCT Filed Jun. 7, 2019, PCT No. PCT/JP2019/022773 § 371(c)(1), (2) Date Dec. 7, 2020, PCT Pub. No. WO2019/240045, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 2018-113478 (JP), filed on Jun. 14, 2018.
Prior Publication US 2021/0247278 A1, Aug. 12, 2021
Int. Cl. G01N 1/40 (2006.01); B01J 20/06 (2006.01); B01J 20/10 (2006.01); B01J 20/28 (2006.01); B03C 1/01 (2006.01); B03C 1/28 (2006.01)

CPC G01N 1/405 (2013.01) [B01J 20/06 (2013.01); B01J 20/103 (2013.01); B01J 20/28007 (2013.01); B01J 20/28009 (2013.01); B01J 20/28021 (2013.01); B03C 1/01 (2013.01); B03C 1/28 (2013.01); G01N 1/4077 (2013.01); B03C 2201/18 (2013.01); B03C 2201/26 (2013.01)]

17 Claims

1. A plurality of core-shell particles (C), each core-shell particle (C) comprising:

a core layer (P) as a matrix of silica particles containing magnetic metal oxide particles (A); and

a Shell layer (Q) that is a silica layer on a surface of the core layer (P), an average thickness the shell layer (Q) in the plurality of core-shell particles (C) being 3 to 3000 nm,

wherein a weight percentage of the magnetic metal oxide particles (A) in the core layer (P) is 60 to 95 wt % based on a weight of the core layer (P), and

the plurality of core-shell particles (C) have a particle size distribution with a coefficient of variation of 21 to 50%.