Granules based on pyrogenically produced aluminium oxide, process for the production thereof and use thereof

US6743269B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Juergen Meyer · Taunusstein, DE
• Peter Neugebauer · Barmstedt, DE
• Martin Steigerwald · Herzogenaurach, DE

Key dates

• Filing date: Aug 6, 2002
• Grant date: Jun 1, 2004
• Expiry date: Nov 23, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/22
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Granules based on aluminium oxide having the characteristics:Average grain diameter:5.0 to 150 &mgr;mTamped density:300 to 1200 g/lThe granules are produced by dispersing aluminium oxide in water, performing spray drying, optionally heat treatment and/or silanization. In silanized form, the granules have the following characteristics:Average grain diameter:5 to 160 &mgr;mTamped density:300 to 1200 g/lCarbon content:0.3 to 12.0 wt. %The granules are used inter alia as catalyst supports, in cosmetics, in toner powders, in paints and lacquers, as abrasives and polishing agents and as a raw material in the production of glass and ceramics.