Method for producing a catalyst arrangement for the production of phthalic anhydride

US8796173B2 · kind B2 · utility

Assignee

• SÜD-CHEMIE IP GMBH & CO. KG · DE

Inventors

• Hans-Jörg Wölk · Rosenheim, DE
• Gerhard Mestl · Munich, DE

Key dates

• Filing date: Sep 8, 2010
• Grant date: Aug 5, 2014
• Expiry date: Oct 9, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2208/025
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for producing phthalic anhydride by catalytic gas-phase oxidation of o-xylene and/or naphthalene, carried out by means of a catalyst arrangement which has a first catalyst layer at the gas inlet side and at least one second catalyst layer after the first catalyst layer in the gas flow direction with different catalytic activity, wherein when the gas-phase oxidation is being carried out a lower maximum temperature is formed in the first catalyst layer than in the second catalyst layer. Furthermore, a method for producing the catalyst arrangement, as well as the catalyst arrangement itself.