Preparation of acrolein or methacrolein by actalytic gas-phase oxidation of propene or isobutene

US5144091A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans Martan · Bischofswerda, DE
• Ulrike Wegerle · Worms, DE
• Wilhelm Ruppel · Mannheim, DE
• Lothar Riekert · Karlsruhe, DE
• Dieter Becker · Neunburg vorm Wald, DE
• Michael Kotter · Bruchsal, DE

Key dates

• Filing date: Jul 19, 1991
• Grant date: Sep 1, 1992
• Expiry date: Jul 19, 2011

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 or isobutene to acrolein or methacrolein in a tubular fixed bed reactor or catalytically active oxides with a .gtoreq.90% conversion of the initial olefin on a single passage, wherein the temperature of the gases containing the reactants in the direction of flow along the tubes from their entrance until the conversion of the initial olefin is from 30 to 70% is from 360.degree. to 420.degree. C. and is then adjusted to from 360.degree. to 300.degree. C. until the conversion of the initial olefin is from 80 to 90% and is thereafter maintained at from 330.degree. to 390.degree. C. until the gases emerge from the tubes, is described.