Manufacture of high surface area spheroidal alumina particles ha

Details Manufacture of high surface area spheroidal alumina particles ha Manufacture of high surface area spheroidal alumina particles ha

1978-11-13

1980-08-05

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252463, 423628, B01J 2104, B01J 3700

Patent

active

042161223

ABSTRACT:
A method of preparing high surface area-high average bulk density spheroidal alumina particles is disclosed. Spheroidal alumina hydrogel particles prepared by the oil drop method are aged in an aqueous ammoniacal solution containing from about 4 to about 20 wt. % ammonium salt, and thereafter water-washed, dried and calcined to yield high surface area spheroidal alumina particles having an average bulk density of from about 0.6 to about 0.8 grams per cubic centimeter.

REFERENCES:
patent: 2774743 (1956-12-01), Hoekstra
patent: 3887492 (1975-06-01), Hayes

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