Partially crystalline, transitional aluminum oxides, methods for their synthesis and use for obtaining molded articles, which consist essentially of gamma Al.sub.2 O.sub.3

US5413985A · kind A · utility

Assignees

• Vereinigte Aluminium-Werke A.G. · DE
• Leuna-Werke AG · DE

Inventors

• Roland Thome · Bonn, DE
• Hubertus Schmidt · Pocking, DE
• Reinhard Feige · Bonn, DE
• Ulrich Bollmann · Bodenwerder, DE
• Rudiger Lange · Braunsbedra, DE
• Seigfried Engels · Halle (Saale), DE

Key dates

• Filing date: Dec 30, 1992
• Grant date: May 9, 1995
• Expiry date: Dec 30, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/22
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a partially crystalline, transitional aluminum oxide containing 4-fold and 5-fold coordinated aluminum oxide in a ratio of at least 1:2. The invention also relates to a method of making this composition. The composition is particularly useful as starting material for manufacturing highly reactive molded articles. Accordingly, the invention also relates to this manufacturing process.