Nanoparticles of alumina and oxides of elements of main groups I and II of the periodic table, and their preparation

US7993445B2 · kind B2 · utility

Assignee

• Clariant Finance (BVI) Limited · VG

Inventors

• Norbert Roesch · Gersthofen, DE
• Ernst Krendlinger · Friedberg, DE
• Anja Heinze · Meitingen, DE
• Karl Zeisberger · Gersthofen, DE
• Peter Klug · Großostheim, DE
• Waltraud Simsch · Kelkheim, DE

Key dates

• Filing date: Jan 26, 2010
• Grant date: Aug 9, 2011
• Expiry date: Jan 26, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S977/773
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Nanoparticles are claimed which consist of 50-99.99% by weight of alumina and 0.01-50% by weight of metal oxide of elements of main group I and II of the Periodic Table. These nanoparticles are obtained by drying a suspension of aluminum chlorohydrate, oxide formers and, if desired, crystallization nuclei, followed by calcining and comminution of the resultant agglomerates.