Basf Aktiengesellschaft

Basf Se Corporation

Bernhard Geissler

Eckhard Stroefer

Rocco Paciello

Torsten Mattke

Heinz-Josef Kneuper

Edgar Zeller

Roland Krokoszinski

Michael R&ouml;per

Matthias Kloetzer

Johann-Peter Melder

Hans Peter Rath

Peter Zehner

Guido Voit

Hartwig Voss

Dietmar Posselt

Gerhard Schulz

Carsten Knoesche

Andreas Woelfert

Norbert Mahr

Wolfgang Richter

Andreas Wölfert

Andreas Johann Schmidt

Heinrich-Josef Blankertz

J&uuml;rgen Decker

Joachim Rosch

Ernst Langguth

Rolf Müller

Carsten Knösche

Rolf M&uuml;ller

Karl-Heinz Walczuch

The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric polyurethanes and thermal dissociation of the latter, in which the polyisocyanates produced and unusable residues are separated off at particular stages of the reaction and reusable by-products and intermediates are recirculated to preceding stages.

Process for preparing isocyanates

The invention relates to an improved multistage process for the continuous preparation of diisocyanates by reaction of the corresponding diamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric urethanes and thermal dissociation of the latter.

The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.

A process for preparing hydroformylation products of olefins having from 2 to 8 carbon atoms comprises The proposed coupling of the hydroformylation with, for example, a steam cracker allows complete hydroformylation of the olefins produced without olefin losses via the waste gas.

Method for producing hydroformylation products of olefins with 2 to 8 carbon atoms

Method for processing a liquid hydroformylation discharge

Functionalized cyclopentene-derived oligomer mixtures, their preparation and their use

The invention relates to a method for the production of aldehydes or aldehydes and alcohols by hydroformylation of olefins in the presence of a complexing catalyst homogeneously dissolved in a reaction mixture, containing a metal of Group VIIIa of the periodic table of the elements and a phosphorus-free, polydentate nitrogen compound suitable for complex formation as ligand at temperatures ranging from 50 to 100&deg; C. and pressures from 20 to 1,000 bar and recirculating the catalyst complex in the hydroformylation reaction, wherein a) derivatized polyamines are used that are substantially non-water soluble and suitable for complex formation and have a mean molecular weight of more than 1,000 Dalton and at least 10 nitrogen atoms; b) the catalyst complex remaining in the bottom of the distillation column and the excess ligands obtained from the reaction mixture are recirculated totally or partially in the hydroformylation once the hydroformylation reaction and the separation or partial separation by distillation of the aldehydes and the alcohols has been completed; c) continues or at least batchwise evacuation of at least part of the high boiler from the bottom of the distillation of the reaction mixture is then carried out.

Method for the production of aldehydes

Polyolefins and their functionalized derivatives

Process for producing aldehydes by hydroformylation of olefins

Fuel or lubricant compositions containing secondary polyisobutene amines

Growing community of inventors

Kirchheim, Germany

Bernhard Geissler