公开(公告)号：US11913862B2

公开(公告)日：2024-02-27

申请号：US16972857

申请日：2019-06-07

申请人： SANYO CHEMICAL INDUSTRIES, LTD.

发明人： Takahiro Kitagawa ,  Masumi Ueda

IPC分类号： G01N1/40 ,  B01J20/06 ,  B01J20/10 ,  B01J20/28 ,  B03C1/01 ,  B03C1/28

CPC分类号： G01N1/405 ,  B01J20/06 ,  B01J20/103 ,  B01J20/28007 ,  B01J20/28009 ,  B01J20/28021 ,  B03C1/01 ,  B03C1/28 ,  G01N1/4077 ,  B03C2201/18 ,  B03C2201/26

摘要： The present invention aims to provide core-shell particles that can be used in a method of separating a substance to be separated and that allow obtainment of a highly purified product. Each of a plurality of core-shell particles (C) of the present invention includes a core layer (P) as magnetic silica particles containing the 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 of a plurality of shell layers (Q) 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 50% or less.