Heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid

US7157597B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Dieterle · Ludwigshafen, DE
• Jochen Petzoldt · Mannheim, DE
• Heiko Arnold · Mannheim, DE
• Wilhelm Ruppel · Mannheim, DE
• Klaus Joachim Mueller-Engel · Blankenloch, DE

Key dates

• Filing date: Mar 19, 2004
• Grant date: Jan 2, 2007
• Expiry date: Jun 25, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/252
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid, the starting reaction gas mixture is oxidized over a fixed catalyst bed 1 which consists of at least two fixed catalyst bed zones and is accommodated in two successive temperature zones A, B, and the transition from temperature zone A to temperature zone B does not coincide with a transition from one fixed catalyst bed zone to another fixed catalyst bed zone.