Bayer Materialscience Ag

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Bayer Aktiengesellschaft

Hilti Aktiengesellschaft

Lanxess Deutschland Gmbh

Bayer Materialscience, LLC

Covestro Intellectual Property Gmbh & Co. Kg

Bayer Technology Services Gmbh

Futurecarbon Gmbh

Volker Michele

Jens Assmann

Werner Obrecht

Andreas Bulan

Stefan Wershofen

Aurel Wolf

Leslaw Mleczko

Sigurd Buchholz

Reiner Rudolf

Christian Münnich

Heiko Herold

Friedhelm Steffens

Dietmar Wastian

Daniel Gordon Duff

Rainer Weber

Thomas Knauf

Fritz Gestermann

Wolfgang Lorenz

Rainer Bruns

Johan Vanden Eynde

Michael Bierdel

Bernd Pennemann

Herbert Stutz

Rolf Bachmann

Jürgen Kintrup

Fritz Pohl

Hans-Dieter Pinter

Richard Adamson

Thomas Früh

Joachim Zechlin

Jens Langanke

Klaus Biskup

Jan Heijl

Michael Traving

Torsten Ziser

Wilfried Hedderich

Christian Steffens

Gernot Jaeger

Wolfgang Taube

Erik Sluyts

Wolf Kloeckner

Jürgen Spriewald

Franz Beggel

Qiang Wei

Juergen Spriewald

Anke Hielscher

Juergen Muennig

Jürgen Bausa

Zhangyong Ming

Guenther Sanchen

Yuguo Gai

Michael Grossholz

Thomas Bludowsky

Werner König

Hans-Joachim Brockhaus

Kristof Heylen

Alexander Karpenko

Maziar Kakhi

Jens Aβmann

Leslaw Mileczko

Jesse Caravaggio

John F Gisch, Jr

Felix Cock

Thomas Voessing

Enke Liu

Ricardo Serra

Gernot JÄGER

Thomas VÖSSING

The invention relates to a method for producing aniline or an aniline derivative, in which a solution of aminobenzoic acid in aniline with a mass fraction of aniline in the solution, in relation to the total mass of aminobenzoic acid and aniline, in the region of 20% to 85%, is subject to a thermal decarboxylation at a temperature in the region of 165&#xb0; C. to 500&#xb0; C. without the presence of a non-system catalyst, such that the aminobenzoic acid is converted into aniline. The obtained aniline can be converted into derivatives, such as di- and polyamines of the diphenylmethane series.

Method for producing aniline or an aniline derivative

A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.

Method for producing polycarbonate

A process for quenching, in a quenching zone, a gaseous reaction mixture that includes a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosgenation of a diamine in the gas phase. The process includes injecting a deposit preventing liquid in a deposit preventing zone located between the reaction zone and the quenching zone by passing the deposit preventing liquid through spray nozzles for the deposit preventing liquid at the entrance to the deposit preventing zone. Each spray nozzle for the deposit preventing liquid sprays the deposit preventing liquid (i) onto a wall segment of the deposit preventing zone that is adjacent to said spray nozzle for the deposit preventing liquid to produce a film of the deposit preventing liquid flowing along the wall, and/or (ii) to areas in a cross-sectional plane of the deposit preventing zone before the entrance to the quenching zone.

Process for quenching a gaseous reaction mixture obtained in the gas phase phosgenation of diamines

The present invention relates to a process for preparing an isocyanate by reacting a primary amine with phosgene, comprising I) providing an amine solution, II) providing a phosgene solution, III) mixing the amine solution with the phosgene solution in a mixing unit, followed by IV) further conversion in an adiabatically operated reaction zone and the removing of the gas phase formed as a result of the chemical reaction in a separation zone, V) expanding the remaining liquid phase in two or three stages, VI) further conversion of the liquid phase remaining after the last expansion stage in an indirectly heated reaction zone and VII) isolating the isocyanate from the reaction solution obtained therein.

Process for preparing an isocyanate by partly adiabatic phosgenation of the corresponding amine

A distillation column for separating a multicomponent mixture into at least three fractions. The distillation column has at least one separating wall and at least one material exchange element () above the at least one separating wall. A device () for mixing the steam flows flowing upwards to the left and the right of the at least one separating wall is arranged between the at least one separating wall and the at least one material exchange element (). The use of the distillation column for purifying isocyanates, in particular for toluene diisocyanate (TDI), is also described.

Distillation column and use thereof for cleaning isocyanates

The present invention relates to a process for the production of carbon nanotubes, in particular those having a diameter of 3-150 nm and an aspect ratio of length:diameter (L:D)&#x3e;100, by decomposition of hydrocarbons on a heterogeneous catalyst which comprises Mn, Co, preferably also molybdenum, and an inert support material, and the catalyst and the carbon nanotubes themselves and the use thereof.

Catalyst for producing carbon nanotubes by means of the decomposition of gaseous carbon compounds on a heterogeneous catalyst

The present invention relates to a process for the production of carbon nanotubes by decomposition of hydrocarbons on a heterogeneous catalyst in a fluidized bed reactor, wherein the reactor can be operated batchwise or continuously, and in the case of continuous operation discharge can take place with sifting or without sifting.

Process for the production of carbon nanotubes in a fluidized bed

Aromatic isocyanates are produced by reacting one or more aromatic primary amines with phosgene in the gas phase. The phosgene and primary aromatic amine(s) are reacted at a temperature above the boiling temperature of the amine(s) in a reactor having a reaction space which is essentially rotationally symmetric to the direction of flow. The flow fate, averaged over the cross-section, of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is between 4 and 80% is not more than 8 m/sec. The flow rate averaged over the cross-section of the reaction mixture along the axis of the essentially rotationally symmetric reaction space in the section of the reaction space in which the conversion of the amine groups into isocyanate groups is 4 to 80% is always below the flow rate averaged over the cross-section at the start of this section.

Process for the preparation of isocyanates in the gas phase

Apparatus for hydrogen chloride electrolysis, comprising a cathode that has a layer of nitrogen-doped carbon nanotubes having functional groups containing nitrogen.

Electrolysis cell for hydrogen chloride electrolysis

Process for the reduction of oxygen in aqueous chlorine- and/or chloride-containing solutions in the presence of a catalyst comprising nitrogen-doped carbon nanotubes.

Process for the reduction of oxygen

The invention relates to a catalyst and to a process for hydrogenating organic compounds. In particular, the invention is directed to a process and catalyst for hydrogenating organic compounds with hydrogen. The organic compounds are subjected to hydrogenation in the presence of a catalyst comprising nitrogen-doped carbon nanotubes as a catalytically active component, wherein the proportion of nitrogen in the nanotubes is in the range of from about 0.05 to 20 wt. %.

Catalyst and process for hydrogenating organic compounds

The invention relates to a composition containing at least one microgel, at least one carbon nanotube and at least one organic medium. Said organic medium can be cross-linked or non cross-linked.

Carbon nanotubes and organic media containing microgels

Process for the continuous production of catalysts which are useful for the production of carbon nanotubes by decomposition of gaseous carbon compounds.

Process for the continuous production of catalysts

A process for preparing isocyanates in the gas phase, in which the mixing of the reactants and thus the reaction conditions are significantly improved by means of hydrodynamic measures such as increasing the turbulence of the feed stream in the central nozzle. As a consequence, the necessary residence time in the reactor and thus the length of the reactor are reduced and the formation of polymeric by-products which lead to caking in the reactor and a shortening of the operating period of the reactors is avoided.

Process for preparing isocyanates in the gas phase

A cyclone separator () for use in a suction apparatus () of a hand-held power tool () includes a dirty air inlet (), a suction ventilator () for aspirating, through a suction opening () which is connected with the dirty air inlet (), abrasion particle-carrying suction air, a pure air outlet for letting out purified air, a vortex chamber () arranged between the dirty air inlet () and the pure air outlet, with the dirty air inlet () opening substantially tangentially into the vortex chamber () for generating a swirling stream in a direction toward the pure air extraction element (), a collection chamber (), and particle outlet having at least two particle outlet openings and connecting the vortex chamber with a collection chamber (), with the dirty air inlet opening into the vortex chamber between the two particle outlet openings.

Cyclone separator

Growing community of inventors

Kö'ln, Germany

Volker Michele