Porous spherical silica, catalyst carrier, cosmetic, analytical column, polish, resin composition, and method of producing porous spherical silica
AssigneeTokuyama Corporation
InventorNoriko YOSHIMURA
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AssigneeTokuyama Corporation
InventorNoriko YOSHIMURA
Estimating the term…
Provided are an independent porous spherical silica such that the alkali metal content is reduced, the hardness of the particles is increased, and the number of shred particles is reduced; and a method of producing such a silica. In the porous spherical silica, the diameter (D50) of volume based particle size distribution is 2 μm to 200 μm, the ratio (D10/D90) of the diameter (D10) to the diameter (D90) is at least 0.3, the pore volume is 0.5 to 8 mL/g, the mode pore radius is 5 to 50 nm, the specific surface area is 50 to 400 m2/g, and the arithmetic mean value of “compressive test forces when specimens are found to break” obtained according to JIS Z8844 is 1.0×101 to 2.0×101 mN, the number of particles each having a circularity of at most 0.7 is at most 20, and the alkali metal content is at most 50 ppm.
A porous spherical silica, wherein
A method of producing a porous spherical silica, the method comprising:
Dependencies are inferred from the claim text.