ALUMINUM OXIDE CATALYST SUPPORTS FROM ALUMINA SOLS

摘要

This invention is directed to a method of providing a channeled substrate with a porous washcoat used as a supporting structure for a catalyst. The substrate is coated with a reactive mixture made of components comprising aluminum alkoxide, water, and acid or the alkoxide in an alcohol. The aluminum alkoxide contains hydrolyzable alkoxy groups and has the chemical formula: Al(OR)3, where R is an alkyl or branched alkyl group of 3 to 6 carbon atoms. The method also includes drying and calcining the coating to form a gamma -alumina washcoat.