Basf Aktiengesellschaft

Basf Se Corporation

Andreas Woelfert

Eckhard Stroefer

Carsten Knoesche

Torsten Mattke

Gerhard Olbert

Andreas Brodhagen

Markus Weber

Holger Friedrich

Hans-Juergen Pallasch

Andreas Daiss

Christian Mueller

Martin Sohn

Heinrich-Josef Blankertz

Joachim Pfeffinger

Filip Nevejans

Manfred Heilig

Ulrich Penzel

Wolfgang Mackenroth

Bernd Sachweh

Martin Sesing

Gerrit Waters

Bernhard Geissler

Harald Jachow

Stephan Scholl

Dieter Stuetzer

Steffen Oehlenschlaeger

Andreas Weickgenannt

Tsung-Chieh Cheng

Michael Lorenz

Herald Jachow

Guenter Renz

Hans-Martin Polka

Jochen Gauer

Markus Maurer

Wolfgang Gmeiner

Rene Leuthold

Markus Linsenbuhler

Heinz Driess

Jan Peter Bredehoeft

Frank Grzonkowski

Marcus Reble

A process for compressing a hydrogen-sulfide-comprising gas stream, which comprises

Method for compressing gases containing hydrogen sulfide

The present invention describes a reactor () for continuously preparing hydrogen sulfide HS from hydrogen and sulfur, comprising a distributor device () for distributing gaseous hydrogen in a sulfur melt () present at least in a lower part of the reactor. The distributor device () is arranged in the sulfur melt () and comprises a distributor plate () which is arranged in the reactor () and has an edge () extending downward and, if appropriate, has passage orifices (). The hydrogen from a hydrogen bubble which forms below the distributor plate () is (for example through the passage orifices ()) distributed in the sulfur melt () via the distributor plate ().

Reactor and method for production of hydrogen sulphide

The invention relates to a process for preparing polyisocyanates by reacting primary amines with phosgene, which comprises the steps

Method for producing polyisocyanates

The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently reacted with phosgene.

Method for producing isocyanates

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

Process for preparing isocyanates

The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase, react in the presence of an inert medium. A number, n, of amine streams are reacted with a number, n +1, of phosgene streams in a reactor. The number n is a positive integer of at least 1. All amine and phosgene streams are introduced into the reactor through annular gaps for mixing.

The present invention relates to a process for preparing isocyanates.

Method for the production of isocyanates

The invention relates to a process for preparing isocyanates in the gas phase.

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

Method for the purification of isocyanates

The invention relates to a process for preparing aromatic diisocyanates by reaction of phosgene with diamines in the gas phase, in which the reaction is carried out in a reaction zone at moderate pressures, i.e. the pressure in this reaction zone is more than 3 bar and less than 20 bar.

Moderate-pressure gas phase phosgenation

Method for producing diisocyanates

The invention relates to a process for preparing polyisocyanates by reacting organic amines with phosgene, wherein the reaction is carried out in at least three stages, with the first stage being carried out in a mixing apparatus, the second stage in at least one residence apparatus and the third stage in at least one separation apparatus and the pressure in each successive stage being lower than that in the previous stage.

Method for the continuous production of isocyanates

The invention relates to a process for separating hydrogen chloride and phosgene, which comprises bringing a mixture of hydrogen chloride and phosgene into contact with an ionic liquid in which at least part of the hydrogen chloride is dissolved in a step a) and then separating off the hydrogen chloride dissolved in the ionic liquid in a step b).

Method for separating hydrogen chloride and phosgene

Isocyanates are prepared by reacting primary amines with phosgene in a reactor by a process in which a reaction discharge is present in the form of a suspension which contains the isocyanate to be prepared, as a liquid, and carbamyl chlorides as a solid, and the suspension is worked up in a film evaporator, and this process is carried out in a production plant.

Reprocessing of reaction material discharged from phosgenation reactors

The invention relates to a process for preparing isocyanates by reacting amines with phosgene in the gas phase in a reaction zone, with the reaction mixture being passed through a zone into which a liquid is sprayed to stop the reaction, wherein the reaction mixture is passed through a zone having a reduced flow cross section between the reaction zone and the zone into which the liquid is sprayed.

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Bad Rappenau, Germany

Andreas Woelfert