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US 12,410,061 B2Granted
Spray evaporation of a liquid raw material for preparation of silicon dioxide and metal oxides
AssigneeEvonik Operations GmbH
InventorsJoachim Erz, Claudia Severin, Maximilian Cornelius
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Abstract
The present invention relates to a process for preparing a metal oxide, comprising a) spraying a liquid raw material comprising at least one metal compound by mixing it with a gas to form an aerosol; b) forming a gaseous reaction mixture from the aerosol obtained in step a) by complete evaporation thereof; c) converting the gaseous reaction mixture obtained in step b) to metal oxide in the presence of oxygen.
Claims20
A process for preparing silicon dioxide and/or a metal oxide, comprising the following steps:
- a) forming an aerosol by spraying a liquid raw material comprising at least one silicon compound and/or a metal compound into a gas stream;
- b) forming a gaseous reaction mixture by complete evaporation of the aerosol obtained in step a);
- c) converting the gaseous reaction mixture that was formed by complete evaporation in step b) to silicon dioxide and/or a metal oxide by reacting the gaseous reaction mixture in a flame at an adiabatic flame temperature of more than 500° C. in the presence of oxygen;
- wherein the process takes place in a reactor comprising reaction zones A and B, and wherein:
- step b) takes place entirely in zone A;
- step c) takes place entirely in zone B.
3 more elements
Dependencies are inferred from the claim text.