Use of foam bodies in oxidation reactors for preparing unsaturated aldehydes or carboxylic acids

US8841481B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Horst-Werner Zanthoff · Neheim, DE
• Nicole Brausch · Erlangen, DE
• Franz-Felix Kuppinger · Marl, DE
• Jorg Sauer · Rodenbach, DE
• Andreas Sabbagh · Dülmen, DE
• Dennis Fruhling · Gelsenkirchen, DE
• Markus Weber · Langenfeld, DE
• Oliver Becker · Ludwigsburg, DE

Key dates

• Filing date: Jul 29, 2009
• Grant date: Sep 23, 2014
• Expiry date: Oct 14, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing unsaturated aldehydes or unsaturated carboxylic acids by heterogeneous catalytic gas phase oxidation of unsaturated or saturated hydrocarbons, comprising the process steps of: i) providing a gas mixture comprising a saturated hydrocarbon and catalytically dehydrogenating the saturated hydrocarbon in the gas phase to obtain a gas mixture comprising an unsaturated hydrocarbon in a dehydrogenation reactor having a dehydrogenation catalyst material; or ii) providing a gas mixture comprising oxygen and an unsaturated hydrocarbon; iii) catalytically oxidizing the unsaturated hydrocarbon obtained in process step i) or provided in process step ii) in the gas phase to obtain a gas mixture comprising an unsaturated aldehyde in a first oxidation reactor having a first oxidation catalyst material; wherein at least one of the reactors selected from the dehydrogenation reactor, the first oxidation reactor and the second oxidation reactor comprises at least one foam body.