Claims
- 1. Pyrogenically prepared titanium dioxide doped by means of an aerosol and containing an oxide from the group zinc oxide, platinum oxide, magnesium oxide and/or aluminium oxide as the doping component.
- 2. Process for the preparation of the pyrogenically prepared titanium dioxide doped by means of an aerosol according to claim 1, wherein an aerosol is fed into a flame such as is used for the preparation of pyrogenic titanium dioxide by means of flame hydrolysis, that aerosol is mixed homogeneously before or during the reaction with the gas mixture of the flame oxidation or flame hydrolysis, the aerosol/gas mixture is allowed to react in a flame, and the resulting doped pyrogenically prepared oxide is separated from the gas stream in a known manner, there being used as the starting material for the aerosol a salt solution or suspension containing the component of the substance to be doped, which may be a metal salt or metalloid salt or mixtures of the two or a suspension of an insoluble metal or metalloid compound or a mixture of the two, the aerosol being produced by atomisation by means of a two-component nozzle or by an aerosol generator, preferably by ultrasonic atomisation.
- 3. A photocatalyst comprising the pyrogenically prepared titanium dioxide doped by means of an aerosol according to claim 1.
- 4. An adsorbant for UV radiation comprising the pyrogenically prepared titanium dioxide doped by means of an aerosol according to claim 1.
- 5. A process for purification of waste water comprising contacting the pyrogenically prepared titanium dioxide doped by means of an aerosol according to claim 1 with said waste water.
- 6. A process for purification of waste air and/or waste gasses comprising contacting the pyrogenically prepared titanium dioxide doped by means of an aerosol according to claim 1 with said waste air and/or waste gases.
Priority Claims (2)
Number |
Date |
Country |
Kind |
00 106 612.5 |
Mar 2000 |
EP |
|
00 106 687.7 |
Mar 2000 |
EP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of U.S. patent application Ser. No. 09/817,789, filed Mar. 27, 2001, which in turn claims priority to European Application No. 00 106 612.5, filed on Mar. 28, 2000, and European Application No. 00 106 687.7, filed on Mar. 29, 2000. The subject matter of all applications are incorporated herein in their entirety by reference.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09817789 |
Mar 2001 |
US |
Child |
10435038 |
May 2003 |
US |