Patent ID: 6908874
Filing Date: 2005-06-21
Classification: A24D,B01J

Abstract:
1. A process for making a catalytic rare earth metal oxide-coated microporous particulate material having greater than 20% by weight of said rare earth metal oxide coated on outer surfaces of said microporous particulate material, based on the total equivalent rare earth metal oxide and microporous particulate material content, said process comprising the steps of: i) combining an amount of a colloidal dispersion of rare earth metal oxide hydrate with a compatible microporous particulate material to form a slurry, the amount of the colloidal dispersion being sufficient to provide, when heat treated as per step (ii), greater than 20% by weight of the rare earth metal oxide, said microporous particulate material having an average pore size of less than 20 Å and said colloidal dispersion having a particle size of at least 20 Å, to position thereby, said colloidal dispersion on said outer surfaces of said microporous particulate material; and ii) heat treating said slurry at a temperature below about 200° C., above about 400° C., or sequential combinations thereof wherein said slurry is heat treated, firstly, at temperatures below about 200° C. and secondly, above about 400° C., to fix the resultant rare earth metal oxide on said outer surfaces of said microporous particulate material, to provide a free flowing bulk particulate.