Oxea Corporation

Oq Chemicals Corporation

Dirk Bermann

Heinz Strutz

Kurt Schalapski

Norman Nowotny

Guido D Frey

Peter Heymanns

Matthias Eisenacher

Thorsten Kreickmann

Donald K Raff

Leif Johnen

Sebastian Geisel

Norman Nowotney

Process for obtaining ditrimethylolpropane and trimethylolpropane-enriched product streams from the high-boiling fractions and residues which are obtained in the distillative purification of trimethylolpropane includes three stage distillation characterized in that second and third stages are configured as thin film evaporators with a column attachment with the second stage facilitating trimethylopropane recovery and the third stage facilitating ditrimethylolpropane recovery.

Method for recovering di-trimethylolpropane and trimethylolpropane-enriched product streams from the side streams of trimethylolpropane production

A continuous process for preparing primary aliphatic amines having 3 to 18 carbon atoms by reacting corresponding aliphatic aldehydes with ammonia and hydrogen in the presence of a hydrogenation catalyst, characterized in that the reaction is carried out without solvent at a molar ratio of aliphatic aldehyde to ammonia of more than 1 to 16, above the critical temperature and above the critical pressure of ammonia.

Continuous method for producing primary aliphatic amines from aldehydes

The invention relates to a continuous method for carrying out a multiphase aldol condensation reaction to obtain mixed &#x3b1;,&#x3b2;-unsaturated aldehydes by reacting a mixture of two aliphatic aldehydes having different numbers of carbon atoms, i.e. 2 to 5, in the molecule in a vertical tubular reactor in a concurrent flow in the presence of an aqueous solution of a basically reacting compound. In said method, the aldehyde mixture is dispersed in the aqueous phase in the form of drops, and the aqueous solution of the basically reacting compound flows through the tubular reactor as a continuous phase in laminar conditions.

Method for carrying out multiphase aldol condensation reactions to give mixed &#x3b1;, &#x3b2;-unsaturated aldehydes

A continuous process for producing primary aliphatic amines having 9 to 18 carbon atoms by reaction of corresponding aliphatic aldehydes with ammonia and hydrogen in the presence of a hydrogenation catalyst in the liquid phase, characterized in that the reaction is carried out solventlessly at a molar ratio of aliphatic aldehyde:ammonia of at least 1:30, at a temperature of 100 to 200&#xb0; C. and at a pressure of 6 to 11 MPa.

Method for producing primary aliphatic amines from aldehydes

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Mülheim, Germany

Dirk Bermann