Basf Aktiengesellschaft

Basf Se Corporation

Filip Deberdt

Jan D Jacobs

Eckhard Stroefer

Hans-Juergen Pallasch

Martin Sohn

Ulrich Penzel

Wolfgang Mackenroth

Filip Nevejans

Peter Van Den Abeel

Rolf Pinkos

Peter Zehner

Otto Machhammer

Klaus Harth

Ulrich Steinbrenner

Christian Walsdorff

Heiner Schelling

Kai Thiele

Michael Bock

Samuel Neto

Andreas Wölfert

Martin Sesing

Eckhard Ströfer

Martin Karches

Olga Schubert

Helmut Moehwald

Martin Fiene

Jürgen Ciprian

Leo Denissen

Koenraad Vandewalle

Juergen Ciprian

Veronika Quaschning

Bart Van De Voorde

Karen Vercruysse

Michael Reiser

Hendrik De Winne

Johnny Moors

Klaus; Harth

A process for obtaining pure aniline contains

Process for obtaining pure aniline

(Chloro)hydrocarbon-free hydrogen chloride and phosgene-free (chloro)hydrocarbons are recovered from a hydrogen chloride stream having (chloro)hydrocarbons and phosgene. The recovery involves connecting a first adsorber and a second adsorber in series and passing the fresh hydrogen chloride stream comprising phosgene and (chloro)hydrocarbons firstly through the first adsorber and subsequently through the second adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the first adsorber, passing the fresh hydrogen chloride stream through the second adsorber while the first adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration, passing the fresh hydrogen chloride stream firstly through the second adsorber and subsequently through the regenerated first adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the second adsorber, and passing the fresh hydrogen chloride stream through the first adsorber while the second adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration.

Process for extracting (chlorinated) hydrocarbon-free hydrogen chloride and phosgene-free (chlorinated) hydrocarbons from a hydrogen chloride stream containing (chlorinated) hydrocarbons and phosgene

The invention provides a process for the simultaneous preparation of 4,4'-diphenylmethanediamine and also diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, which comprises the steps

Process for simultaneously preparing 4,4'-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates

The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.

Separation of a substance mixture consisting of hydrogen chloride and phosgene

The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.

Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent

A process is described for preparing diaminodiarylmethanes comprising the steps

Method for the production of diaminodiarylmethanes

Process for preparing organic isocyanates, which comprises the steps

Integrated process for preparing isocyanates

A process for the continuous recovery of (meth)acrylic acid from the reaction gases of a catalytic gas-phase oxidation by (I) absorption in a high-boiling solvent, (II) isolation of the (meth)acrylic acid from the mixture with the solvent and, if required, further purification of the (meth)acrylic acid isolated, (III) purification of the solvent and (IV) recycling of the purified solvent to absorption stage (I) is proposed, the temperature in each process stage not exceeding 155&deg; C., in particular 140&deg; C., preferably 120&deg; C.

Continuous recovery of (meth)acrylic acid

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Muizen, Belgium

Filip Deberdt