Different to conventional methods such as the traditional Bayer or the Ziegler process, Evonik prepares AEROXIDE® Alu aluminum oxide in a special flame hydrolysis process from very pure starting materials. This process leads to consistently high purity levels and tailored particle design. AEROXIDE® Alu products are at least 99.7% pure aluminum oxide. Their exceptional structural stability at extreme temperatures makes them ideal for high-temperature catalyst applications like reverse water-gas shift reactions, reforming processes, and automotive emission control.
Evonik’s AEROXIDE® alumina are composed of agglomerated aggregates with an open fractal structure. This is different from the commonly dense aluminum oxide particles available on the market. The agglomerated structure of AEROXIDE® aluminum oxides can be broken up by high energy powder mixing or dispersion processes to yield particles of submicron size. These can be used in coatings, e.g., wash coats in automotive catalysts or micro-structured reactors.
For customers without high energy mixing equipment available, AERODISP® water-based dispersions of fumed aluminum oxide offer an alternative to AEROXIDE® Alu powder products.
