Method for producing aliphatic carboxylic acids from aldehydes by microreaction technology

US8664434B2 · kind B2 · utility

Assignee

• OXEA GMBH · DE

Inventors

• Tonia Weber · Darmstadt, DE
• Alexander Kaufmann · Dinslaken, DE
• Oliver Borgmeier · Neuss, DE
• Thorsten Kreickmann · Oberhausen, DE
• Heinz Strutz · Usingen, DE
• Diana Utz · Bad Mergentheim, DE
• Elias Klemm · Stuttgart, DE
• Claudia Liebold · Chemnitz, DE

Key dates

• Filing date: Mar 3, 2010
• Grant date: Mar 4, 2014
• Expiry date: Nov 30, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J19/0093
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing aliphatic carboxylic acids having 3 to 10 carbon atoms by oxidizing the corresponding aldehydes with oxygen or oxygen-containing gases, characterized in that (i) the oxidation is performed in a microreactor at elevated pressure and with an oxygen excess based on the stoichiometrically required amount of oxygen, and (ii) in that the reaction mixture removed from the microreactor is passed through at least one postreactor without further addition of oxygen, and (iii) wherein the oxidation reaction in the microreactor is performed under such conditions that aldehyde and corresponding peracid formed are present in the reaction mixture removed in a molar ratio within a range of 1:(0.9 to 1.1), preferably of 1:(0.95 to 1.05).