Patent ID: 6710010
Filing Date: 2004-03-23
Classification: B01D,B01J,Y02C

Abstract:
A process for making a zirconia catalyst, comprising the steps of:(a) preparing a paste comprising a step selected from the group consisting of: (i) mixing zirconium hydroxide with a solution of zirconyl nitrate, water, and nitric acid; (ii) mixing relatively fine particle size zirconium hydroxide and relatively coarse particle size zirconium hydroxide with a solution of zirconyl nitrate and water; and (iii) mixing relatively fine particle size zirconium hydroxide and relatively coarse particle size zirconium hydroxide with a solution of zirconyl nitrate, water, and nitric acid; wherein, in (i), (ii), and (iii) there may optionally be one or more additional solvents added in addition to water; (b) forming a shaped particle from the step (a) paste; (c) drying the step (b) shaped particle; and (d) calcining the dried step (c) shaped particle at a temperature of at least 400Â° C.