Patent ID: 6204219
Filing Date: 2001-03-20
Classification: B01J,C01F,C01G,C01P

Abstract:
A process for preparing a mixed metal oxide of cerium oxide and at least one other non-noble metal oxide, the process comprising:preparing a homogeneous, aqueous solution of a cerium IV salt and at least one non-noble metal salt;contacting the salt solution with an aqueous hydrogen peroxide solution in an amount of at least about 2.5 moles per molar equivalent of cerium;treating the peroxide-treated solution with an excess of a base to precipitate a cerium hydroxide and at least one non-noble metal hydroxide;washing and drying the precipitate; andcalcining the precipitate at a temperature sufficient to form a mixed metal oxide of cerium oxide and at least one non-noble metal oxide, wherein the mixed metal oxide is in the form of particles and the particles have a specific surface area of at least 30 m.sup.2 /g after heat treatment at 900.degree. C. for 4 hours.