Patent ID: 7314607
Filing Date: 2008-01-01
Classification: B01J,C01B,C01G,C01P

Abstract:
1. A method for preparation of the meso porous transition metal mixed oxide characterized in that the pore wall of meso pore has a crystalline structure maintained over whole primary particles comprising, adding a transition metal salt which is a precursor of the transition metal mixed oxide into the solution prepared by dissolving a polymer surfactant into organic solvent and dissolving, transforming said transition metal salt to a sol solution by hydrolysis and polymerization, obtaining a gel state product from said sol solution and carrying out a primary calcination on said product at the temperature of 400±50° C. for 5-20 hours, then carrying out a secondary calcination at the temperature of 600-800° C. for 10 minutes to 10 hours, wherein said transition metal mixed oxide comprises a mixture of metal elements selected from the group consisting of Zn, Zr, Nb, and Ta.