Amorphous silica-alumina spherical particles and process for pre

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

1990-02-26

1992-08-18

Breneman, R. Bruce

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

502263, 585 17, 428402, C01B 3326

Patent

active

051397609

ABSTRACT:
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.

REFERENCES:
patent: 2786758 (1957-03-01), Taylor
patent: 2990247 (1961-06-01), Conrad et al.
patent: 3784392 (1974-01-01), Bertorelli
patent: 4268574 (1981-05-01), Peccenini et al.
patent: 4959268 (1990-09-01), Hagiwara et al.

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