Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2011-04-05
2011-04-05
Hendrickson, Stuart (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S604000, C423S605000, C423S608000
Reexamination Certificate
active
07919068
ABSTRACT:
A method of producing porous complex oxides includes the steps of providing a mixture of a) precursor elements suitable to produce the complex oxide; or b) one or more precursor elements suitable to produce particles of the complex oxide and one or more metal oxide particles; and c) a particulate carbon-containing pore-forming material selected to provide pore sizes in the range of approximately 7 nm to 250 nm, and treating the mixture to (i) form the porous complex oxide in which two or more of the precursor elements from (a) above or one or more of the precursor elements and one or more of the metals in the metal oxide particles from (b) above are incorporated into a phase of the complex metal oxide and the complex metal oxide has grain sizes in the range of about 1 nm to 150 nm; and (ii) remove the pore-forming material under conditions such that the porous structure and composition of the complex oxide is substantially preserved. The method may be used to produce non-refractory metal oxides as well.
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Alarco Jose Antonio
Edwards Geoffrey Alan
Talbot Peter Cade
Hendrickson Stuart
Rump Richard M
Very Small Particle Company Limited
Winston & Strawn LLP
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