Patent ID: 7799727

Claim:
A process for preparing a layered composition comprising an inner core, and an outer layer over the inner core, the outer layer comprising a refractory inorganic oxide having a surface area of at least 30 m 2 /g, a fibrous component having a length from about 2 to about 1,000 micrometers and an inorganic binder, and wherein the fibrous component is dispersed throughout the outer layer, the process comprising: coating an inner core with a slurry comprising an outer refractory inorganic oxide, a fibrous component, an inorganic binder precursor, an organic bonding agent and a solvent to provide a coated core; and calcining the coated core at a temperature of at least 200° C. for a time sufficient to bond the outer layer to the inner core to thus provide a layered composition.