Process for producing water-dispersible alumina hydrates having a nanocrystalline structure and use thereof

US6030599A · kind A · utility

Assignee

• RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie · DE

Inventors

• Klaus Noweck · Brunsbüttel, DE
• Jurgen Schimanski · Brunsbüttel, DE
• Arnold Meyer · Marne, DE

Key dates

• Filing date: May 3, 1996
• Grant date: Feb 29, 2000
• Expiry date: May 3, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/776
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing alumina hydrates having a boehmite structure is provided. These alumina hydrates are dispersible in water. The boehmite or pseudoboehmite in colloids having a pH value of between 3 and 7 is present in a nanocrystalline form (<4 nm) whereby an exceptionally high translucence is imparted to the colloid.