Process for making extrudates from aluminum oxyhydrates

US4048295A · kind A · utility

Assignee

• Condea Chemie GmbH · DE

Inventors

• Martin Wassermann · Hamburg, DE
• Arnold Meyer · Marne, DE

Key dates

• Filing date: Dec 16, 1975
• Grant date: Sep 13, 1977
• Expiry date: Dec 16, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/21
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Formed products are made from aqueous aluminum oxyhydrate by peptizing the aqueous aluminum oxyhydrate with an acid and then subsequently adding a dilute solution of ammonia or an ammonia yielding compound following by extrusion, drying and calcining.