	US 12,291,461 B2
	Cerium oxide nanoparticle, dispersion body, oxidant, antioxidant, and method of producing cerium oxide nanoparticle
Shota Sekiguchi, Kamakura (JP); Takahiro Motoshiromizu, Kamakura (JP); and Masateru Ito, Kamakura (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/788,687
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Dec. 25, 2020, PCT No. PCT/JP2020/048918 § 371(c)(1), (2) Date Jun. 23, 2022, PCT Pub. No. WO2021/132928, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-236819 (JP), filed on Dec. 26, 2019.
Prior Publication US 2023/0030648 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C01F 17/206 (2020.01); C01F 17/235 (2020.01); C02F 1/72 (2023.01); C09K 15/02 (2006.01); C09K 15/30 (2006.01); C02F 101/30 (2006.01)

CPC C01F 17/235 (2020.01) [C02F 1/72 (2013.01); C09K 15/02 (2013.01); C09K 15/30 (2013.01); C01P 2004/64 (2013.01); C02F 2101/308 (2013.01)]

14 Claims

1. A cerium oxide nanoparticle produced by 1) mixing a solution of an aromatic heterocyclic compound having no substituent or at least one substituent selected from the group consisting of a methyl group, an ethyl group, an amino group, an aminomethyl group, a monomethylamino group, a dimethylamino group, and a cyano group and containing 2 to 8 carbon atoms and 1 to 4 nitrogen atoms in a ring structure of the aromatic heterocyclic compound, with a solution containing a cerium (III) ion or with a cerium (III) salt, 2) followed by addition of an oxidant.