Bayer Intellectual Property Gmbh

Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Bayer Aktiengesellschaft

Bayer Materialscience Ag

Covestro Ag

Lanxess Deutschland Gmbh

Nanox Corporation

Jürgen Kintrup

Andreas Bulan

Rainer Weber

Horst Berneth

Friedrich-Karl Bruder

Thomas Rölle

Dennis Hönel

Leslaw Mleczko

Aurel Wolf

Stefan Sepeur

Volker Michele

Thomas Prinz

Peter Lehner

Guido Giffels

Stefanie Eiden

Alfred Soppe

Knud Werner

Rolf Hempelmann

Andreas Schulze Tilling

Harald Natter

Jens Assmann

Norbert Schmitz

Frank Rauscher

Jens Aβmann

Gerald Frenzer

Frank Gross

Friedhelm Kämper

Eric Jakobs

Jörg-Dietrich Jentsch

Gerald John

Elin Hammarberg

Hans-Jürgen Grob

Matthias Weis

Ruiyong Chen

Vinh Trieu

Alexander Karpenko

Gerhard Moormann

Odo Muddemann

Jens Aßmann

Hans-Jürgen Gross

The invention relates to a process for preparing triaryl organo borates proceeding from organoboronic esters in the presence of an n-valent cation 1/n K, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Method for producing triarylorganoborates

The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n K, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Provided herein is a process for preparing triaryl organoborates of the formula 1/n KRB&#x2014;R(IV), where one equivalent of organoboronic ester of the formula B&#x2014;R(OR)(OR) (I) is initially charged together with 1/n equivalents of salt KnX(II) and 3 equivalents of metal M in a solvent or a solvent mixture S1, 3 equivalents of a haloaromatic R&#x2014;Y (III) are added, an auxiliary L and optionally a second organic solvent or solvent mixture S2 is added and the compound 1/n KRB&#x2014;R(IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.

The invention relates to an oxygen-consuming electrode, in particular for use in chloralkali electrolysis, comprising a novel catalyst coating based on carbon nanotubes and a silver-based cocatalyst, and to an electrolysis device. The invention further relates to a method for producing said oxygen-consuming electrode and to the use thereof in chloralkali electrolysis or fuel cell technology.

Oxygen-consuming electrode and method for producing same

The present invention relates to a gas diffusion electrode that includes an electrically conductive carrier, and a porous coating based on an electrochemically active catalyst and a hydrophobic material, wherein the electrode has a first side facing an oxygen-containing gas and a second side facing an alkaline electrolyte, wherein the catalyst comprises a noble metal as a catalytically active component, wherein the hydrophobic material comprises a hydrophobic polymer, and wherein the coating comprising the catalyst has a pore volume from 10 to 500 mm/g, and a pore diameter in the range from 100 to 10,000 nm.

Gas diffusion electrode and process for production thereof

A gas diffusion electrode is described, especially for use in chloralkali electrolysis, said gas diffusion electrode having finely divided components on the liquid side. The electrode is notable for a low perviosity to gases and a lower operating voltage.

Gas diffusion electrodes and process for production thereof

Processes for the production of chlorine by multi-stage oxidation, for example, by thermal reaction of hydrogen chloride with oxygen using catalysts or by non-thermal activated reaction of hydrogen chloride with oxygen, in which the gas mixture formed in the reaction, comprising the target products chlorine and water, unreacted hydrogen chloride and oxygen, and possibly other secondary constituents, such as carbon dioxide and nitrogen, (a) is cooled to condense hydrochloric acid as an aqueous solution of hydrogen chloride and (b) the aqueous solution of hydrogen chloride formed is separated from the gas mixture, characterised in that (c) the separated aqueous solution of hydrogen chloride is fed at least partially to an electrochemical oxidation in which at least part of the hydrogen chloride is oxidised to chlorine, (d) the chlorine gas occurring in step d) is optionally added to the gas mixture occurring in step c), (e) the residues of water present in the gas mixture from steps c) and e), in particular by washing with sulfuric acid, are removed, (f) the chlorine-rich gas mixture forming is freed of oxygen and optionally of secondary constituents.

Processes for the production of chlorine from hydrogen chloride and oxygen

Processes for electrolysis of alkali metal chlorides with oxygen-consuming electrodes having startup and shutdown conditions which prevent damage to the constituents of the electrolysis cell.

Process for electrolysis of alkali metal chlorides with oxygen-consuming electrodes

An oxygen-consuming electrode is described, more particularly for use in chloralkali electrolysis, comprising a novel catalyst coating, as is an electrolysis apparatus. Also described is a production process for the oxygen-consuming electrode and the use thereof in chloralkali electrolysis or fuel cell technology. The oxygen-consuming electrode comprises at least an electrically conductive support, an electrical contact site and a gas diffusion layer comprising a catalytically active component, characterized in that the coating at least one fluorinated polymer, silver in the form of silver particles and silver oxide in the form of silver oxide particles, which is produced in a selected precipitation step.

Oxygen-consuming electrode and process for production thereof

Process for electrolysis of alkali metal chlorides with oxygen-consuming electrodes having specific operating conditions for startup and shutdown, which prevents damage to constituents of the electrolysis cell.

Process for electrolysis of alkali metal chlorides with oxygen-consuming electrodes in micro-gap arrangement

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

The invention relates to a process for the preparation of isocyanates in a system network comprising an isocyanate production plant, a chlorine production plant and a phosgene production plant, in which carbon dioxide formed as a by-product is partially to completely condensed out with the gaseous chlorine formed in the chlorine production plant and enters into the phosgene preparation process and, after the preparation of phosgene, the predominant part of the carbon dioxide formed is thereby sluiced out of the system network in gaseous form.

Process for the preparation of isocyanates

The present invention relates to an electrode that includes an electrically conducting substrate based on a valve metal having a main proportion of titanium, tantalum or niobium, and an electrocatalytically active coating comprising up to 50 mol % of a noble metal oxide or noble metal oxide mixture and at least 50 mol % of titanium oxide. The coating includes a minimum proportion of oxides of anatase structure determined by a ratio of the signal height of the most intensive anatase reflection in an x-ray diffractogram (Curadiation) after subtraction of a linear background to the signal height of the most intensive rutile reflection in the same diffractogram, wherein the ratio is at least 0.6.

Electrode for electrolytic production of chlorine

Alcohols prepared by reacting carboxylic acids and/or carboxylic esters with hydrogen in the presence of a special catalyst.

Process and catalyst for preparing alcohols

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Leverkusen, Germany

Jürgen Kintrup