Photocatalytic process

US6508941B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Jurgen Meyer · Aschaffenburg, DE
• Hilmar Gilges · Aschaffenburg, DE
• Ina Hemme · Hanau, DE
• Anna Moiseev · Clausthal-Zellerfeld, DE
• Sven-Uwe Geissen · Clausthal-Zellerfeld, DE

Key dates

• Filing date: May 25, 2001
• Grant date: Jan 21, 2003
• Expiry date: Jul 31, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/908
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for photocatalytic removal of organic substances from waste waters, wherein by way of photocatalyst use is made of granulates based on pyrogenically prepared titanium dioxide having the following physicochemical characteristic data: Mean grain diameter:10 to 150 &mgr;mBET surface:25 to 100 m2/gpH value:3 to 6Compacted bulk density:100 to 1,200 g/l.