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AssigneeEvonik Degussa GmbH
InventorsStipan KATUSIC, Michael Kraemer, Michael Kroell, Peter Kress, Edwin Staab
Estimating the term…
Process for the production of a metal oxide powder having a BET surface area of at least 20 m2/g by reacting an aerosol with oxygen in a reaction space at a reaction temperature of more than 700° C. and then separating the resulting powder from gaseous substances in the reaction space, wherein the aerosol is obtained by atomisation using a multi-component nozzle of at least one starting material, as such in liquid form or in solution, and at least one atomising gas, the volume-related mean drop diameter D30 of the aerosol is from 30 to 100 μm and the number of aerosol drops larger than 100 μm is up to 10%, based on the total number of drops, and metal oxide powder obtainable by this process.
Cerium oxide powder which is predominantly in the form of aggregates of primary particles and the aggregates exhibit no cenospherical structure, wherein the powder has a BET surface area of from 30 to 90 m2/and an isoelectric point at a pH value of from 9 to 11.
Cerium oxide powder obtainable by a process comprising reacting an aerosol with oxygen in a reaction space at a reaction temperature of more than 700° C. and then separating the resulting powder from gaseous substances in the reaction space, wherein the aerosol is obtained by atomising using a nozzle at least one starting material comprising cerium, either as such in liquid form or in solution, and at least one atomising gas, the volume-related mean drop diameter D30 of the aerosol is from 30 to 100 μm, and the number of aerosol drops larger than 100 μm is up to 10%, based on the total number of drops.
Dependencies are inferred from the claim text.