US EPA

2117106 

Journal Article 

High-Porosity, High-Surface Area, Low-Bulk Density Alumina 

Ziegenhain, WC 

1976 

A method for producing low-density, high-porosity, high- surface area alumina from an aqueous alumina slurry produced by the water hydrolysis of aluminum alkoxides and containing up to about 32 wt per cent Al2O3 comprises: mixing aqueous alumina slurry with an organic solvent selected from the group consisting of ethanol, propanol, isopropanol, butanol, isobutanol and tertiary butanol to form a solvent-aqueous alumina mixture containing the solvent in an amount equal to from 25-250per cent of the amount of solvent required to azeotropically remove the water from the aqueous alumina slurry upon drying the mixture; drying the solvent-aqueous alumina mixture; and recovering alumina having a pore volume (0-10000 A) from 1.0-2.75 cc/g, a loose bulk density from 7.5-25 lb/cu ft and a surface area from about 260-400 sq m/g. 

Surface area; Powder technology; Aluminum oxides; Porosity; Bulk density; Patents; (19 Oct. 1976)