Process for reactivating ammoxidation catalysts

US5378668A · kind A · utility

Assignee

• EC Erdolchemie GmbH · DE

Inventors

• Brigitte Beuke · Cologne, DE
• Jens Herwig · Cologne, DE
• Ernst-Friedrich Neeb · Dormagen, DE
• Nikolaus Paris · Dormagen, DE

Key dates

• Filing date: Apr 12, 1993
• Grant date: Jan 3, 1995
• Expiry date: Apr 12, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Molybdenum/bismuth-based fluid-bed catalysts which are used for the ammoxidation of olefins can be reactivated by addition of a mixed oxide of formula EQU Mo.sub.20 (P, Cr).sub.0.3-2.0 (Bi, Ni, Fe, Co).sub.1.33-4.0 O.sub.x wherein, besides Mo, one element from component group (P, Cr) and one or more metals from component group (Bi, Ni, Fe, Co) are present, and PA1 x results from the valency requirements, the mixed oxide being applied to SiO.sub.2 as support.