Oxea Corporation

Jens Theuerkauf

Heinz Strutz

Guido D Frey

Matthias Eisenacher

Kristina Kockrick

A process for preparing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary streams obtained in the preparation of pentanoic acids, includes generating a stream enriched with 2-methylbutanal and 3-methyl-butanal. The stream enriched with 2-methylbutanal and 3-methylbutanal of step is reacted with formaldehyde. The reaction with formaldehyde is followed by removal of the organic phase and selective hydrogenation in the presence of a hydrogenation catalyst with hydrogen at elevated temperature and elevated pressure and, after removal of the hydrogenation catalyst, treatment of the hydrogenation output obtained with an oxidizing agent.

Method for producing 2-methylbutyric acid having a reduced content of 3-methylbutyric acid from the secondary flows arising in the production of pentanoic acids

Process for preparing isononylamines starting out from 2-ethylhexanol, characterized in that (a) 2-ethylhexanol is dehydrated in the presence of a catalyst to form octene; (b) the octene obtained in step a) is reacted with carbon monoxide and hydrogen in the presence of a transition metal compound of group VIII of the Periodic Table of the Elements to form isononanal; and (c) the isononanal obtained in step b) is converted into isononylamines.

Isononylamines from 2-ethylhexanol, processes for their preparation, and their use

A process for preparing 2-methylbutanal from the secondary streams obtained in the preparation of mixtures of isomeric &#x3b1;,&#x3b2;-unsaturated decenals, characterized in that a) a mixture comprising linear butenes is reacted in the presence of transition metal compounds of group VIII of the Periodic Table of the Elements with carbon monoxide and hydrogen at elevated temperature and elevated pressure to give a pentanal mixture; b) the pentanal mixture obtained in step a) is converted in the presence of basic compounds to a mixture of isomeric &#x3b1;,&#x3b2;-unsaturated decenals; and c) the mixture obtained in step b) is separated into a stream enriched with unconverted 2-methylbutanal and a stream enriched with a mixture of isomeric &#x3b1;,&#x3b2;-unsaturated decenals; with the proviso that the stream which has been separated off in step c) and is enriched with unconverted 2-methylbutanal is reacted with formaldehyde.

Method for producing 2-methylbutanal from the secondary flows arising in the production of mixtures of isomeric alpha, beta-unsaturated decenals

A process for preparing isomeric hexanoic acids comprising 2-methylpentanoic acid from the secondary streams obtained in the preparation of pentanals, characterized in that a) a mixture comprising linear butenes is reacted to give a pentanal mixture; b) the mixture obtained in step a) is separated into a stream enriched with 2-methylbutanal and 3-methyl-butanal, and a stream enriched with n-pentanal; c) the stream enriched with 2-methylbutanal and 3-methylbutanal of step b) is reacted with formaldehyde; d) the reaction mixture obtained after step c) is selectively reacted to give a mixture comprising 2-methylbutanal and isomeric hexanals; e) the reaction mixture is separated into a stream enriched with 2-methylbutanal and a stream enriched with a mixture of isomeric hexanals; and f) the mixture of isomeric hexanals obtained in step e) is oxidized to a mixture of isomeric hexanoic acids comprising 2-methylpentanoic acid.

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Krefeld, Germany

Jens Theuerkauf