Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2006-10-24
2006-10-24
Vanoy, Timothy C. (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S593100, C423S608000, C423S610000, C423S618000, C423S263000, C423S594170, C423S069000, C423S089000, C423S021100, C423S062000, C423S598000, C423S594120, C423S594900, C423S594800, C502S217000, C502S353000, C502S305000, C502S232000, C502S355000, C502S300000, C977S773000, C977S775000, C977S811000
Reexamination Certificate
active
07125536
ABSTRACT:
This invention relates to a composition comprising nano-structured metal oxide particles (particularly, zirconia) and at least one stabilizing agent, a method to produce the composition, and a method to produce the thermally stable nano-structured particles. The method to produce the nano-structured particles comprises first preparing a base solution and a nanoparticle precursor solution, then combining these solutions at a final pH 7 or greater to precipitate a colloidal hydrous oxide. The colloidal hydrous oxide is then treated with at least one silicate, phosphate, or aluminum phosphate stabilizing agent and dried. These nano-structured particle products have high thermal stability and are particularly advantageous in applications as catalysts or catalyst supports that operate at high temperatures.
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Fu Guoyi
Lehaut Corinne
Monk BillieJo
Carroll Kevin M.
Kalow & Springut LLP
Millennium Inorganic Chemicals, Inc.
Vanoy Timothy C.
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