Preparation of catalytically active poly-metal oxide materials which contain the elements V and Mo in oxide form as basic components

US5637546A · kind A · utility

Assignee

• BASF SE

Inventors

• Andreas Tenten · Maikammer, DE
• Ulrich Hammon · Mannheim, DE
• Peter Weidlich · Mannheim, DE

Key dates

• Filing date: Apr 19, 1996
• Grant date: Jun 10, 1997
• Expiry date: Apr 19, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2523/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the preparation of catalytically active poly-metal oxide materials containing Mo and V, a catalyst intermediate is calcined at from 300.degree. to 450.degree. C. in a gas atmosphere which, in addition to inert gases and/or steam, consists of from 0.5 to 4% by volume of O.sub.2 and, averaged over the calcination time, from 1 to 8% by volume of NH.sub.3.