Basf Aktiengesellschaft

J&ouml;rg Therre

Gerd Kaibel

Werner Aquila

Hartwig Fuchs

Wolfgang Siegel

Klaus Ebel

Andreas Kramer

Alexander Weck

Heinz Isak

Regina Benfer

Matthias Kiefer

Carsten Oost

Mathias Haake

Hans Volkmar Schwarz

Norbert Sendhoff

Dirk Franke

Eckhard Str&ouml;fer

Kirsten Burkart

Helmuth Menig

Gerhard Fritz

Andreas Weiper-Idelmann

Manfred Munzinger

Michael Sander

Melanie Pahl

Hans-Georg G&ouml;bbel

Michael Dr&ouml;gem&uuml;ller

Markus Maurer

G&uuml;nter Wegner

Carsten Gr&ouml;ning

Rene Leuthold

Michael Schulik

Franz Sch&uuml;tz

J&uuml;rgen Schossig

Siegfried Richter

Burghard Hantel

Rainer Dietz

J&uuml;rgen Koopmann

Ulrich Sch{umlaut Over (a)}fer-L{umlaut Over (u)}derssen

The present invention relates to a continuous process for the preparation of cinnamaldehyde or cinnamaldehyde derivatives by continuous reaction of benzaldehyde derivatives with alkanals in the presence of bases and optionally subsequent continuous hydrogenation in a circulation reactor in the presence of a suspension catalyst and hydrogen to give dihydrocinnamaldehyde derivatives.

Continuous method for production of cinnamaldehyde and dihydrocinnamaldehyde derivatives

Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

Method for the production of a particle-containing preparation of tetrahydro-3,5-dimethyl-1,3,5-thiadiazin-2-thione

A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.

Work-up of distillation residues from the synthesis of toluene diisocyanate

Method for the continuous production of glutaraldehyde

The present invention relates to a continuous process for the preparation of unsaturated acetals by reacting olefinically unsaturated aliphatic compounds with allyl alcohols in a reaction column, where the reactants are only partially reacted in the reaction column, the resulting acetal is concentrated in at least two successive evaporation stages, and the recovered reactants are returned to the reaction column.

Continuous process for the preparation of acetals

In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an acidic reaction mixture in which the acetal product and water form an azeotropic mixture, with or without the retention of some methanol reactant. After subjecting a single phase acidic reaction mixture to an azeotropic distillation, it will separate into two distinct liquid phases with a simple recovery of the acetal product from the aqueous phase.

Preparation of methylglyoxal dimethyl acetal

Continuous preparation of dimethylvinylcarbinol by isomerizing prenol

3,7-Dimethyl-2,6-octadien-1-al of formula I is prepared continuously by:

Preparation of citral

Growing community of inventors

Worms, Germany

Jörg Therre

Growing community of inventors

Worms, Germany

J&ouml;rg Therre

Jörg Therre