Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Technology Services Gmbh

Covestro Intellectual Property Gmbh & Co. Kg

Bayer Intellectual Property Gmbh

Sartorius Stedim Biotech Gmbh

H.c. Starck Gmbh

Michael Traving

Johann Rechner

Jörg Hofmann

Aurel Wolf

Stefanie Braun

Pieter Ooms

Andreas Bulan

Rainer Weber

Werner Bäcker

Hartmut Nefzger

Frank Richter

Oscar-Werner Reif

Johan Vanden Eynde

Kai Laemmerhold

Volker Michele

Matthias Wohak

Thomas Elsner

Rolf Bachmann

Ulrich Grummert

Arno Nennemann

Ralf Lausch

Rafael Warsitz

Wolfgang Kummer

Sascha Plug

Wilfried Gutknecht

Marc Buts

Andreas Nickel

Urs Rauwald

Daniel-Gordon Duff

Erik Sluyts

Helmut Meyer

Holger Linne

Horst Zwick

Lars Krueger

Nicole Welsch

Guido Naberfeld

Martina Mutter

Andre Pastor

Kristof Heylen

Stephan Bahnmuler

Gerhard Langstein

Julia Hitzbleck

Holger Rosellen

Patrick Theato

Daniel Kessler

Salvatore Manzelli

Gregor Dudziak

Cosimo Calandrelli

Rainer Ludwig

Stephan Reimer

Joerg Kolle

Stefan Bahnmüller

Stefan Haufe

Provided is a method for preparing a solution B comprising at least one catalyst in at least one second solvent, comprising at least the following steps of (A) providing a solution A comprising the at least one catalyst in at least one first solvent, (B) treating the solution A from step (A) with activated carbon, (C) removing the activated carbon from the solution A, and (D) exchanging the at least one first solvent in solution A for at least one second solvent in order to obtain the solution B comprising the at least one catalyst in at least one second solvent, to a solution of at least one catalyst in at least one second solvent, obtainable by the method according to the invention, to the use of this solution for preparing a composition comprising the at least one catalyst, the at least one second solvent, at least one polyisocyanate and at least one NCO-reactive compound, to the use of this composition for producing a single-layered or multi-layered coating system and a corresponding process.

Method for preparing and processing catalyst solutions

The invention relates to a method for producing polyether carbonate polyols by adding alkylene oxides and carbon dioxide to an H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (&#x3b3;) alkylene oxide and carbon dioxide are added to an H-functional starter substance in a reactor with a total pressure (absolute) of 5 to 120 bar in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, and a reaction mixture containing the polyether carbonate polyol is obtained, (&#x3b4;) the reaction mixture obtained in step (&#x3b3;) remains in the reactor or is optionally continuously transferred to a downstream reactor at a starting total pressure (absolute) of 5 to 120 bar, the content of free alkylene oxide in the reaction mixture being reduced in the course of a downstream reaction in each case, and the total pressure (absolute) can be reduced by up to 50% during the step (&#x3b4;), and (&#x3b6;) the content of highly volatile components of the obtained reaction mixture is thermally reduced at a temperature of 80&#xb0; C. to 200&#xb0; C. The invention is characterized in that (&#x3b5;) the reaction mixture resulting from step (&#x3b4;) is brought to a total pressure (absolute) of &#x2264;2.0 bar, preferably 0.5 bar to 2.0 bar, particularly preferably 0.9 bar to 1.1 bar, prior to step (&#x3b6;) and then left at a temperature of 80 to 180&#xb0; C. for a dwell time of at least 0.5 h. After the dwell time has expired, 5 to 100 ppm of component K is added to the resulting mixture, component K being selected from at least one compound which contains a phosphorus-oxygen-hydrogen group.

Method for producing polyether carbonate polyols

The present invention relates to a method for producing polyether carbonate polyols by addition of one or more alkylene oxides and carbon dioxide to one or more H-functional starter substances in the presence of at least one DMC catalyst, in which the reaction is conducted in a main reactor () and a tubular reactor () connected as a post reactor downstream thereof, wherein the method is characterized in that at the outlet () of the tubular reactor () a temperature is set that is at least 10&#xb0; C. above the temperature in the inside of the main reactor (). The invention further relates to a device for carrying out said method.

Method for the production of polyether carbonate polyols and device therefor

The invention relates to a method for producing polyether carbonate polyols by binding alkylene oxides and carbon dioxide to one or more H-functional starter substance/s in the presence of a double metal cyanide (DMC) catalyst, characterized in that (y) one or more H-functional starter substance/s and DMC catalyst are continuously metered into the reactor during the binding process, and the free alkylene oxide concentration in the reaction mixture amounts to 1.5 to 5.0 wt %, and the obtained reaction mixture is continuously discharged from the reactor.

A process for preparing diaryl carbonate and utilizing at least part of the process wastewater by increasing the concentration of the wastewater phases containing sodium chloride for the electrolysis by means of osmotic membrane distillation with simultaneous dilution of the sodium hydroxide solution obtained from the electrolysis for the diaryl carbonate production process (diphenyl carbonate process) is described.

Process for preparing diaryl carbonate

A method for separating electrolyte-containing water from an organic phase by means of permeation on a hydrophobic separating means. The permeated organic solution is substantially depleted in water and the retained water is enriched with electrolytes.

Method for separating an organic phase from an electrolyte-containing aqueous and organic phase

Method for improving selectivity and productivity during purification of charged macromolecules and particles by electrofiltration by means of membranes in the electric filed. The ratio between the electric field and the permeate flow through the membrane is kept constant.

Electrofiltration method

A process is described for producing polycarbonate and utilizing at least some of the process waste water by concentrating the sodium chloride-containing waste water phases for the electrolysis using osmotic membrane distillation, if appropriate with simultaneous dilution of the sodium hydroxide solution obtained from the electrolysis for the polycarbonate production process.

Process for producing polycarbonate

The present invention relates to calix[4]arenes which effectively bind alkali metal ions (Na, K) and transport them over phase boundaries, their preparation and use.

Particular calixarenes method for production and use thereof

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Burscheid, Germany

Michael Traving