Process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid

US8076510B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Hammon · Mannheim, DE
• Thorsten Friese · Mannheim, DE
• Jochen Petzoldt · Mannheim, DE
• Klaus Joachim Mueller-Engel · Blankenloch, DE
• Ulrich Cremer · Mannheim, DE
• Andreas Raichle · Ludwigshafen, DE

Key dates

• Filing date: Apr 22, 2008
• Grant date: Dec 13, 2011
• Expiry date: Mar 8, 2030

Classification

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

Abstract

A process for starting-up a heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid or of methacrolein to methacrylic acid over a fixed catalyst bed disposed in a tube bundle reactor cooled by a heat exchange medium, wherein the temperature of the heat exchange medium is ≧290° C. and the temperature of that reactor plate surface which faces the reaction gas entry mixture and the temperature of the reaction gas entry mixture itself are ≦285° C.