Oxea Corporation

Alexander Kaufmann

Heinz Strutz

Tonia Weber

Peter Heymanns

Kurt Schalapski

Thorsten Kreickmann

Horst Scholz

Elias Klemm

Rolf-Peter Schulz

Oliver Borgmeier

Claudia Liebold

Thomas Hupperich

Diana Utz

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).

Method for producing aliphatic carboxylic acids from aldehydes by microreaction technology

The present invention relates to a process for obtaining neopentyl glycol by hydrogenating cracking of high-boilers occurring in the production process in the presence of copper-chromite catalysts. The hydrogenating cracking proceeds in the absence of solvent at a temperature of 140 to 220&#xb0; C. and at pressures of 7 to 28 MPa.

Process for preparing neopentyl glycol by cracking high boilers occurring in the production process

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Dinslaken, Germany

Alexander Kaufmann