Process for continuous production of flocculating agent from red mud

US3986975A · kind A · utility

Assignee

• Gebr. Giulini GmbH

Inventors

• Gerhard Bayer
• Egon Cherdron · Schifferstadt, DE

Key dates

• Filing date: Aug 22, 1973
• Grant date: Oct 19, 1976
• Expiry date: Aug 22, 1993

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F1/5236
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Red mud from the production of alumina from bauxite by the Bayer process is converted to a flocculating agent by reaction with sulfuric acid and drying the reaction product by direct heat transfer thereto by contact with hot solid bodies and by contact with hot gases. The resulting solid product is a mixture of water-soluble sulfates of iron and aluminum with minor proportions of other water-soluble metal sulfates in the form of free-flowing discrete particles.