Basf Aktiengesellschaft

Basf Se Corporation

Heinrich-Josef Blankertz

Eckhard Stroefer

Andreas Woelfert

Hans-Juergen Pallasch

Roland Krokoszinski

Michael R&ouml;per

Matthias Kloetzer

Armin Volker Grenacher

Torsten Mattke

Alexander Weck

Herwig Hoffmann

Michael Röper

Harald Schwahn

Sven Crone

Gerhard Schulz

Carsten Knoesche

Rainer Papp

Max Strohmeyer

Andreas Wölfert

Michael Schönherr

Martin Karches

Hermann Ascherl

Friedrich Sauer

Bernhard Geissler

Till Blum

Volker Krase

Gunter Georgi

Helmut Walz

Carsten Knösche

Willi Sch&ouml;nmann

Christian Benz

Matthias Klötzer

Helmut Zinke-Allmang

Willi Schönmann

Oliver Ryll

Andreas Warzecha

Hans-Jürgen Pallasch

The present invention comprises a process for purifying isocyanate-comprising residues.

Method for purifying residues containing isocyanates

A process for preparing oligomers by continuous oligomerization of butenes is described, wherein a) a feed stream 1) comprising 1-butene and 2-butene in a total concentration of from 10 to 70% by weight and from 10 to 60% by weight of isobutane is reacted until more than 60% by weight of the 1-butene comprised in the feed stream 1 but less than 50% by weight of the 2-butene comprised in feed stream 1 have been converted into oligomers. b) The oligomers obtained in a) are separated off and optionally passed to a further work-up and the remaining residual stream is fed to work-up by distillation. c) Isobutane is separated off by distillation from the residual stream, and d) the isobutane-depleted stream obtained after the work-up by distillation c) is reacted to form oligomers.

Process for preparing oligomers of butene

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

Process for preparing isocyanates

The invention relates to a multistage process for the continuous preparation of organic, distillable isocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic amines with urea and alcohols to liberate ammonia and form low molecular weight monomeric urethanes and thermal dissociation of the latter, in which by-products formed are at least partly utilized.

Method for producing isocyanates

Isocyanates are prepared by a process in which a product stream from the isocyanate synthesis is purified.

Method for the purification of isocyanates

The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.

Essentially monounsaturated polyalkylenes having from 30 to 700 carbon atoms are continuously hydroformylated by a process in which i) a hydroformylation-active cobalt carbonyl catalyst is prepared from a catalyst precursor dissolved in an aqueous phase in the absence of the polyalkylenes, ii) the polyalkylenes are hydroformylated by means of synthesis gas in the presence of the cobalt carbonyl catalyst in a reaction zone, iii) the cobalt carbonyl catalyst is separated from the output from the reaction zone with at least partial reformation of the catalyst precursor and the catalyst precursor is recirculated to step i).

Method for the continuous hydroformylation of polyakenes having 30 to 700 carbon atoms

The invention relates to a process for the preparation of saturated C -C -alcohols in which a liquid hydrogenation feed comprising at least one C -C -aldehyde is passed over a bed of a hydrogenation catalyst in the presence of a hydrogen-containing gas, which comprises adding to the hydrogenation feed an amount, homogeneously soluble therein, of a salt-like base. The addition of base suppresses side reactions, such as acetalization, aldolization, Tischtschenko reaction or ether formation.

Method of producing saturated C3-C20-alcohols

Hydroformylation process

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Forst, Germany

Heinrich-Josef Blankertz