Preparation of acicular .alpha.-Fe.sub.2 O.sub.3

US4826671A · kind A · utility

Assignee

• BASF SE

Inventors

• Volker Arndt · Frankenthal (Pfalz), DE
• Rainer Feser · Havelsee, DE
• Werner Steck · Ludwigshafen, DE
• Helmut Jakusch · Bischofswerda, DE

Key dates

• Filing date: Mar 11, 1987
• Grant date: May 2, 1989
• Expiry date: Mar 11, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/42
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Finely divided, acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from iron(III) salts in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline suspension, at from 80.degree. to 250.degree. C.