Method for carrying out the catalytic gas phase oxidation of propene to form acrylic acid

US6740779B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Andreas Tenten · Maikammer, DE
• Hartmut Hibst · Schriesheim, DE
• Otto Machhammer · Mannheim, DE
• Claus Hechler · Mannheim, DE
• Klaus Joachim Müller-Engel · Blankenloch, DE
• Signe Unverricht · Mannheim, DE

Key dates

• Filing date: Apr 22, 2002
• Grant date: May 25, 2004
• Expiry date: Apr 22, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/25
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for the two-stage catalytic gas-phase oxidation of propene to acrylic acid, the reaction gas starting mixture is passed, in a tube-bundle reactor, with a propene loading of ≧160 l (S.T.P.) of propene/l·h, first over a fixed catalyst bed 1 present in two successive temperature zones A, B and then over a fixed catalyst bed 2 which is housed either in one further temperature zone C or in two further temperature zones D, E, the temperature of the zone A being kept at a lower temperature than the zone B and the temperature of the zone D at a lower temperature than the zone E.