US 12,330,952 B2
Metahalloysite powder and production method therefor
Hidefumi Konnai, Tokyo (JP)
Assigned to JFE MINERAL COMPANY, LTD., Tokyo (JP)
Appl. No. 17/049,438
Filed by JFE MINERAL COMPANY, LTD., Tokyo (JP)
PCT Filed Apr. 24, 2019, PCT No. PCT/JP2019/017471
§ 371(c)(1), (2) Date Oct. 21, 2020,
PCT Pub. No. WO2019/208646, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 2018-084240 (JP), filed on Apr. 25, 2018.
Prior Publication US 2021/0246039 A1, Aug. 12, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C01B 33/40 (2006.01); B82Y 40/00 (2011.01)
CPC C01B 33/40 (2013.01) [B82Y 40/00 (2013.01); C01P 2004/03 (2013.01); C01P 2004/13 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01)] 7 Claims
OG exemplary drawing
 
1. Metahalloysite powder comprising a granule that is an aggregate of metahalloysite including a metahalloysite nanotube covered by elemental carbon, or
metahalloysite powder comprising a granule that is an aggregate of metahalloysite including a metahalloysite nanotube that is tube-shaped metahalloysite, the metahalloysite including elemental carbon,
wherein a differential pore distribution determined from a nitrogen adsorption isotherm by the BJH method exhibits two or more pore size peaks in a range from 10 to 100 nm,
wherein a total pore area is not less than 12.0 m2/g,
wherein an amount of carbon determined by a combustion method is not greater than 5.0 mass %,
wherein the elemental carbon is generated by firing an organic surfactant in an inert atmosphere, and
wherein an average particle size is not less than 1 μm.