Method for preparing pure, thermally stable and high surface...

Details Method for preparing pure, thermally stable and high surface... Method for preparing pure, thermally stable and high surface...

2006-08-22

2006-08-22

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Rare earth compound

C423S593100, C423S594160, C423S021100

Reexamination Certificate

active

07094383

ABSTRACT:
A method for the preparing pure, thermally stable and high surface area ceria is described, wherein the ceria maintains a surface area of 12 m2/g after calcination at 980° C. in air for 4 hours. In the method, an aqueous solution containing Ce3+, Mg2+, organic acid and organic polymer is prepared and then evaporated to obtain a gel. The gel is calcined to obtain a mixed oxide, and then MgO is leached from the mixed oxide with a solvent to obtain raw ceria. The raw ceria is then washed, filtered and dried to obtain a ceria product.

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