HIGH SURFACE AREA ALPHA-ALUMINA AND SUPERCRITICAL FLUID SYNTHESIS THEREOF

摘要

High surface area alpha -alumina free of transitional aluminas and having a BET surface area greater in the range of about 30 to at least about 100 m<2>/g, and a method of producing same comprising the step of heating an alpha -alumina precursor, such as an aluminum hydroxide or a hydrated alumina, with a solvent, such as methanol, under conditions of temperature and pressure that are supercritical for the solvent. The resultant surface area may be controlled by the addition of water to the starting materials.