Process for the regeneration of fluorination catalysts

US4578369A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Thomas Muller · Bad Homburg vor der Höhe, DE
• Gunter Siegemund · Hofheim, DE

Key dates

• Filing date: Jun 25, 1985
• Grant date: Mar 25, 1986
• Expiry date: Jun 25, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J23/72
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

According to the specified process chromium oxyfluoride catalysts which have largely lost their activity are regenerated. The catalysts are mixed with magnesium oxide or magnesium hydroxide in the presence of water and converted into a paste. If necessary the mixture must be concentrated by evaporation until it exhibits the consistency of a paste. Finally the paste is dried. The paste is best converted into molded bodies such as, for example, granules before drying.