Doped, pyrogenically prepared oxides
AssigneeDegussa AG
InventorsHelmut Mangold, Rainer Golchert, Stipan Katusic, Karlheinz Janzon
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Abstract
Doped, pyrogenically prepared oxides of metals and/or non-metals which are doped with one or more doping components in an amount of 0.00001 to 20 wt. %. The doping component may be a metal and/or non-metal or an oxide and/or a salt of a metal and/or a non-metal. The BET surface area of the doped oxide may be between 5 and 600 m2/g. The doped pyrogenically prepared oxides of metals and/or non-metals are prepared by adding an aerosol which contains an aqueous solution of a metal and/or non-metal to the gas mixture during the flame hydrolysis of vaporizable compounds of metals and/or non-metals.
Claims18
A doped, pyrogenic oxide of at least one of a metal, a non-metal and a metalloid, produced by a process comprising:
- providing an aerosol comprised of,
- at least one of a solution and a suspension of a substance to be doped selected from the group consisting of a metal salt, a non-metal salt, a metalloid salt, and mixtures thereof, and
- at least one of a solution and a suspension of a doping substance selected from the group consisting of a metal salt, a non-metal salt, a metalloid salt, and mixtures thereof;
- mixing the aerosol with a combustible gas stream to create a combustible gas stream mixture;
- reacting the gas stream mixture in a flame;
- and
- separating the resulting doped, pyrogenic oxide from the gas stream mixture.
Dependencies are inferred from the claim text.