Preparation of transparent yellow iron oxide pigments

US5451253A · kind A · utility

Assignee

• BASF SE

Inventors

• Paul Klingelhoefer · Mannheim, DE
• Christoph Schwidetzky · Ludwigshafen, DE
• Henning Wienand · Neulußheim, DE
• Norbert Mronga · Dossenheim, DE
• Ekkehard Schwab · Neustadt, DE
• Michael W. Nebel · Smith Center, US

Key dates

• Filing date: Apr 4, 1994
• Grant date: Sep 19, 1995
• Expiry date: Apr 4, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/80
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing transparent yellow iron oxide pigments by the precipitation of iron (II) hydroxide by adding an inorganic base to an iron (II) salt solution and subsequent oxidation to FeOOH.