Heterogeneously catalyzed partial gas phase oxidation of acrolein to acrylic acid

US6982347B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Mar 23, 2004
• Grant date: Jan 3, 2006
• Expiry date: Mar 23, 2024

Classification

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

Abstract

In a process for partially oxidizing acrolein to acrylic acid in the gas phase under heterogeneous catalysis, the starting reaction gas mixture is oxidized at an acrolein loading of ≦145 and ≧70 l (STP) of acrolein/l of fixed catalyst bed·h over a fixed catalyst bed which is accommodated in two successive reaction zones A, B, the highest temperature of the reaction gas mixture within reaction zone A being above the highest temperature of the reaction gas mixture within reaction zone B.