Heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid

US6888024B2 · 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 15, 2004
• Grant date: May 3, 2005
• Expiry date: Mar 15, 2024

Classification

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

Abstract

In a process for heterogeneously catalyzed partial gas phase oxidation of propene to acrylic acid, the starting reaction gas mixture is oxidized at a propene loading of <160 l(STP)/l·h in a first reaction stage over a fixed catalyst bed 1 which is accommodated in two successive reaction zones A, B, and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a fixed catalyst bed 2 which is a accommodated in two successive reaction zones C, D, 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 and the highest temperature of the reaction gas mixture within reaction zone C being above the highest temperature of the reaction gas mixture within reaction zone D.