Method for the production of a catalyst containing vanadium, phosphorus, and oxygen

US7060649B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Jens Weiguny · Freinsheim, DE
• Sebastian Storck · Mannheim, DE
• Mark Duda · Ludwigshafen, DE
• Cornelia Katharina Dobner · Ludwigshafen, DE
• Raimund Felder · Neustadt, DE

Key dates

• Filing date: Mar 12, 2003
• Grant date: Jun 13, 2006
• Expiry date: Mar 18, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/182
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a method for producing a catalyst containing vanadium, phosphorus, and oxygen, which is used for oxidizing the gas phase of a hydrocarbon having at least four carbon atoms to maleic anhydride. According to the inventive method, a corresponding catalyst precursor which contains vanadium, phosphorus, and oxygen and is provided with particles having an average diameter of at least 2 mm is converted into a catalytically active form by means of calcination, and a flow of the catalyst precursor is transported on a conveyor belt across at least one calcination area over a distance 1n at an essentially steady speed in order to be calcinated. The variation over time of the gas temperature in relation to the set point value amounts to ≦5° C. at each position in the area of the flow of the catalyst precursor, which lies within the second half 1n/2 of the calcination area, while the local difference in the gas temperature between any positions in the area of the flow of the catalyst precursor, which is located within the second half 1n/2 of the calcination area, amounts to ≦5° C.