Preparation of complex metal oxides

Details Preparation of complex metal oxides Preparation of complex metal oxides

C - Chemistry, Metallurgy

01

G

C01G 1/02 (2006.01) C01B 13/14 (2006.01) C01B 13/18 (2006.01) C01B 13/36 (2006.01) C01F 11/06 (2006.01) C01G 45/02 (2006.01) C01G 49/02 (2006.01)

Patent

CA 2629059

The present invention provides a process for making a complex metal oxide comprising the formula A x B y O z. The process comprises the steps of: (a) reacting in solution at a temperature of between about 75°C to about 100°C at least one water-soluble salt of A, at least one water-soluble salt of B and a stoichiometric amount of a carbonate salt or bicarbonate salt required to form a mole of a carbonate precipitate represented by the formula A x B y(CO3)n, wherein the reacting is conducted in a substantial absence of carbon dioxide to form the carbonate precipitate and wherein the molar amount of carbonate salt or bicarbonate salt in the solution is at least three times the stoichiometric amount of carbonate salt or bicarbonate salt required to form the carbonate precipitate; and (b) reacting the carbonate precipitate with an oxygen containing fluid under conditions to form the complex metal oxide.

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