Oxea Corporation

Thomas Müller

Heinz Strutz

Guido D Frey

Jörg Arnold

Matthias Kramer

Wolfgang Höfs

Heyko Jürgen Schultz

Michael Adamzik

Willy Schulz

A process is provided for recovering aliphatic monocarboxylic acids having from 4 to 11 carbon atoms from the distillation residue obtained in the oxidation of the corresponding aldehyde by means of oxygen or oxygen-containing gas mixtures in the presence of alkali metal carboxylates or alkaline earth metal carboxylates to form the corresponding monocarboxylic acid and subsequent distillation, characterized in that the distillation residue is reacted with an aqueous acid in a tube reactor and the two-phase mixture flowing out from the tube reactor is introduced into a settling vessel in which the organic phase which separates out has a pH of 4.5 or less.

Process for recovering aliphatic monocarboxylic acids from distillation

The present invention relates to a process for preparing polyol esters by reacting polyols with linear or branched aliphatic monocarboxylic acids having 3 to 20 carbon atoms by partial recycling of the aliphatic monocarboxylic acid removed into the esterification reaction or into subsequent esterification batches.

Process for preparing polyol esters

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Dinslaken, Germany

Thomas Müller