Manufacture of high surface area spheroidal alumina...

Details Manufacture of high surface area spheroidal alumina... Manufacture of high surface area spheroidal alumina...

C - Chemistry, Metallurgy

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C01F 7/02 (2006.01) B01J 20/08 (2006.01) B01J 21/04 (2006.01) B01J 35/08 (2006.01)

Patent

CA 1136599

MANUFACTURE OF HIGH SURFACE AREA SPHEROIDAL ALUMINA PARTICLES HAVING A HIGH AVERAGE BULK DENSITY ABSTRACT A method of preparing high surface area-high average bulk density spheroidal alumina particles is dis- closed. 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. % ammo- nium salt, and thereafter water-washed, dried and cal- cined to yield high surface area spheroidal alumina par- ticles having an average bulk density of from about 0.6 to about 0.8 grams per cubic centimeter.

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