US 12,312,238 B2
Organically modified boron nitride particle, and method for continuously producing same
Tadafumi Ajiri, Miyagi (JP); and Takio Noguchi, Sendai (JP)
Assigned to Super Nano Design Co., Ltd., Miyagi (JP)
Appl. No. 17/997,625
Filed by Super Nano Design Co., Ltd., Sendai (JP)
PCT Filed Mar. 28, 2022, PCT No. PCT/JP2022/014863
§ 371(c)(1), (2) Date Oct. 31, 2022,
PCT Pub. No. WO2022/210484, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-056878 (JP), filed on Mar. 30, 2021.
Prior Publication US 2023/0166971 A1, Jun. 1, 2023
Int. Cl. C01B 21/064 (2006.01)
CPC C01B 21/0648 (2013.01) 8 Claims
OG exemplary drawing
 
1. A method for continuously producing an organically modified boron nitride particle, comprising:
conducting a pretreatment to produce a pretreated boron nitride powder, the pretreatment consisting essentially of any one or more kinds selected from adding an acid to a boron nitride powder, adding a base to a boron nitride powder, adding an oxidant to a boron nitride powder, adding a reductant to a boron nitride powder, and conducting a hydrothermal treatment at a temperature of 400° C. or lower or a solvothermal treatment at a temperature of 400° C. or lower to a boron nitride powder, to exchange B—N bond in the boron nitride powder as a raw material with —BOH and HN— and/or —B(OH)2 and H2N—;
after the pretreatment, adding an aqueous solvent to the pretreated boron nitride powder to disperse the pretreated boron nitride powder uniformly in the aqueous solvent; and
conducting a contacting step in which the pretreated boron nitride powder dispersed in the aqueous solvent and an untreated organic solvent are contacted in a continuous feed manner with an aqueous material in a subcritical state in presence of an acid or a base.