Flame-hydrolytically produced titanium dioxide mixed oxide method of its production and its use

US5672330A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Werner Hartmann · Hamburg, DE
• Helmut Mangold · Rodenbach, DE
• Dieter Kerner · Midland Park, US

Key dates

• Filing date: Apr 18, 1995
• Grant date: Sep 30, 1997
• Expiry date: Apr 18, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/13
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Flame-hydrolytically produced titanium dioxide mixed oxide having a BET surface of 10 to 150 m.sup.2 /g and 1 to 30% by weight aluminum oxide or 1 to 30% by weight silicon dioxide is produced by evaporating aluminum chloride or silicon tetrachloride, transferring the evaporated aluminum chloride or silicon tetrachloride, together with an inert gas, into the mixing chamber of a burner, mixing them with hydrogen, air and gaseous titanium tetrachloride, burning the resulting 4-component mixture in the reaction chamber of the burner, and separating the titanium dioxide mixed oxide from the gaseous reaction products.