IP Library › Granted Patent US 12,330,952
Granted Patent B2
US 12,330,952 · App. 17/049,438 · Granted Jun 17, 2025

Metahalloysite powder and production method therefor

Inventor: Hidefumi Konnai (Tokyo, JP)
Assignee: JFE MINERAL COMPANY, LTD.
C01B33/40B82Y40/00C01P2004/03C01P2004/13C01P2004/61C01P2004/62C01P2006/12C01P2006/14C01P2006/16
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Quick Facts
Patent No.
US 12,330,952
App. No.
17/049,438
Granted
Jun 17, 2025
Kind
B2
Abstract

The present invention provides a novel material using a meta-halloysite that does not exist in prior art, and a production method therefor. The meta-halloysite powder of the present invention is characterized in that: the meta-halloysite is covered by elemental carbon; the meta-halloysite contains elemental carbon; the meta-halloysite powder is a powder containing granules formed by the aggregation of meta-halloysite comprising meta-halloysite nanotubes covered by elemental carbon; or the meta-halloysite powder is powder containing granules formed by the aggregation of meta-halloysite comprising meta-halloysite nanotubes, which are tubular meta-halloysite, wherein the meta-halloysite contains elemental carbon.

Claims (13)

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 m 2 /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.

2. The metahalloysite powder according to claim 1 , wherein the granule includes a first pore derived from a tube hole of the metahalloysite nanotube, and a second pore different from the first pore.

3. The metahalloysite powder according to claim 1 , wherein a ratio of a BET specific surface area determined by a water vapor adsorption method to a BET specific surface area determined by a nitrogen adsorption method (BET specific surface area determined by water vapor adsorption method/BET specific surface area determined by nitrogen adsorption method) is not greater than 0.55.

4. The metahalloysite powder according to claim 1 , wherein an amount of carbon determined by a combustion method is not less than 0.1 mass %.

5. The metahalloysite powder according to claim 1 , wherein an average particle size is from 1 to 200 μm.

6. The metahalloysite powder according to claim 1 , wherein a BET specific surface area determined by a nitrogen adsorption method is not less than 10 m 2 /g.

7. The metahalloysite powder according to claim 1 , wherein an average pore size is not less than 11.0 nm.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 3, 2021
From: KONNAI, HIDEFUMI
To: JFE MINERAL COMPANY, LTD.
Reel/Frame 055124/0391 →
Priority Claims (1)
JP 2018-084240 · Apr 25, 2018 · national
Continuity (1)
Related Publication 20210246039A1 · Aug 12, 2021
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