Process for the pyrogenic production of finely divided oxide of a metal and/or a metalloid

US4347229A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Josef Schmid · Hohenems, AT
• Ludwig Lange · Münstermaifeld, DE
• Hans Klebe · Rheinfelden (Baden), DE
• Dieter Schutte · Rheinfelden (Baden), DE

Key dates

• Filing date: Jun 3, 1980
• Grant date: Aug 31, 1982
• Expiry date: Jun 3, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B13/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

There is provided a pyrogenic process for the production of finely divided oxide of a metal and/or a metalloid in which there is employed as the starting material a vaporizable halogen compound of a metal and/or metalloid. Because of the starting material there is formed elemental halogen which is an impurity in the oxide formed. To remove the halogen there is supplied to the cooling section of the production plant a mixture of hydrogen and inert gas.