Use of synthetic, iron raw materials for preparing iron oxide pigments

US5837216A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wilfried Burow · Krefeld, DE
• Wolfgang Oehlert · Wheeling, US
• Ulrike Pitzer · Krefeld, DE
• Heribert Bade · Krefeld, DE

Key dates

• Filing date: Feb 24, 1997
• Grant date: Nov 17, 1998
• Expiry date: Feb 24, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/64
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to the use of synthetic (synthetically produced) iron raw materials to prepare iron oxide pigments in the Penniman process and other iron-dissolution processes.