US Patent 7897128 Preparation of complex metal oxides
Patent 7897128 was granted and assigned to AIR PRODUCTS AND CHEMICALS, INC. on March, 2011 by the United States Patent and Trademark Office.
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The present invention provides a process for making a complex metal oxide comprising the formula AxByOz. 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 a bicarbonate salt required to form a mole of a carbonate precipitate represented by the formula AxBy(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 is at least three times the stoichiometric amount of carbonate or bicarbonate salt required to form a mole of the carbonate precipitate; and (b) reacting the carbonate precipitate with an oxygen containing fluid under conditions to form the complex metal oxide.
US Patent 07897128 Preparation of complex metal oxides US Patent 7897128 Preparation of complex metal oxides
US Patent 07897128 Preparation of complex metal oxides
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