Preparation of spheroidal silico-alumina particles

Details Preparation of spheroidal silico-alumina particles Preparation of spheroidal silico-alumina particles

1975-02-10

1976-11-23

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252430, 252439, 252442, 252448, 252455R, B01J 3700

Patent

active

039935892

ABSTRACT:
A process for preparing spheroidal silica-alumina particles containing alumina in an amount at least equal to that of silica, comprising dispersing as droplets into a hot and practically water-immiscible fluid, an aqueous mixture comprising an alkali silicate, alumina hydrogel, perchloric acid and a water-soluble monomer whose uncross-linked polymer is water-soluble or forms a gel, alkali silicate and alumina hydrogel being used in proportions corresponding to 0.5 to 50% by weight of SiO.sub.2 and 99.5 to 50% by weight of Al.sub.2 O.sub.3, and maintaining the droplets of the mixture in the fluid until a substantial polymerization of the monomer occurs.

REFERENCES:
patent: 2526907 (1950-10-01), Schmerling
patent: 2966466 (1960-12-01), Schwartz
patent: 3472791 (1969-10-01), Vesely
patent: 3746657 (1973-07-01), Miller et al.
patent: 3776987 (1973-12-01), Grimes et al.

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