Process for the production of spherical shaped bodies based on Al.sub.2 O.sub.3 and optionally SiO.sub.2

US4341663A · kind A · utility

Assignee

• Kali-Chemie Aktiengesellschaft · DE

Inventors

• Helmut Derleth · Nienburg, DE
• Karl-Heinz Bretz · Nienburg, DE
• Gunther Sauer · Berlin, DE

Key dates

• Filing date: Aug 29, 1980
• Grant date: Jul 27, 1982
• Expiry date: Aug 29, 2000

Classification

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

Abstract

A process for the preparation of shaped bodies includes preparing a plastic mixture of a material selected from the group consisting of aluminum oxides, aluminum hydroxides, silicon oxides, silicon hydroxides and mixtures thereof from a predominantly dry component K1 in powdered form and a paste component K2 comprising water and additional additives, continuously extruding the plastic mixture into cut lengths, shaping the cut lengths into spherical shaped bodies and drying the spherical shaped bodies and optionally tempering such bodies to form catalyst and catalyst supports. The solids content of the powdered component K1 is from 65 to 100% by weight whereas the solids content of the paste component K2 is 10 to 50% by weight. Preferable spherical shaped bodies are based on Al.sub.2 O.sub.3, SiO.sub.2, or Al.sub.2 O.sub.3 /SiO.sub.2.