Method for the catalytic gas-phase oxidation of propene to acrylic acid

US6525217B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Signe Unverricht · Mannheim, DE
• Heiko Arnold · Mannheim, DE
• Andreas Tenten · Maikammer, DE
• Ulrich Hammon · Mannheim, DE
• Hans-Peter Neumann · Ludwigshafen, DE
• Klaus Harth · Altleiningen, DE

Key dates

• Filing date: Aug 30, 2001
• Grant date: Feb 25, 2003
• Expiry date: Aug 30, 2021

Classification

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

Abstract

A process for the catalytic gas-phase oxidation of propene to acrylic acid, in which the reaction gas starting mixture is oxidized, with an increased propene loading, in a first reaction stage, over a first fixed-bed catalyst and then the acrolein-containing product gas mixture of the first reaction stage is oxidized, in a second reaction stage, with an increased acrolein loading, over a second fixed-bed catalyst, the catalyst moldings in both reaction stages having an annular geometry.