Amorphous silica-alumina spherical particles and process for...

Details Amorphous silica-alumina spherical particles and process for... Amorphous silica-alumina spherical particles and process for...

C - Chemistry, Metallurgy

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23/186, 6/194

C01B 33/46 (2006.01) A61K 8/26 (2006.01) A61Q 1/02 (2006.01) A61Q 11/00 (2006.01) C01B 33/26 (2006.01) C08K 3/34 (2006.01) C09C 1/40 (2006.01) D21H 17/67 (2006.01) D21H 17/68 (2006.01)

Patent

CA 2011038

Disclosed are amorphous silica-alumina spherical particles having a notched surface. The particles have a small specific surface area and a highly controlled hygroscopic property. The spherical particles are obtained by exchanging at least a part of an alkali metal ion of a P-type zeolite as the starting material with a divalent metal and firing the ion-exchanged zeolite. Since the pH value is shifted to a weakly alkaline level by the ion exchange treatment, the particles are effective as a filler for stabilizing a resin or the like when incorporated therein, and the refractive index of the particles can be made close to that of a resin in which the particles are to be incorporated.

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