Reactor and process for producing alkyl (meth)acrylates

US11858890B2 · kind B2 · utility

Assignee

• Röhm GmbH · DE

Inventors

• Steffen Krill · Mühltal, DE
• Belaid Ait Aissa · Darmstadt, DE
• Andreas Rühling · Darmstadt, DE
• Mounir Stitou · Wuppertal, DE
• Andreas Gräff · Riedstadt, DE
• Olaf Merker · Gondelsheim, DE

Key dates

• Filing date: May 25, 2022
• Grant date: Jan 2, 2024
• Expiry date: Jul 15, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A novel process can be used for a heterogeneously catalysed oxidation reaction, in the presence of a pulverulent noble metal-containing catalyst, where (meth)acrolein, an alkyl alcohol, in particular methanol, and an oxygen-containing gas are converted to an alkyl (meth)acrylate, in particular methyl (meth)acrylate. A corresponding reactor suitable for performing the reaction is also useful. The process allows for an effective retention of the particulate catalyst and the continuous discharge of fines fractions of the catalyst powder which are present, particularly in a fresh catalyst batch as a consequence of its preparation. Such fines fractions may also be produced by abrasion during the reaction. The process allows for effective recycling, recovery, and utilization of these discharged catalyst fractions.