Bayer Aktiengesellschaft

Saltigo Gmbh

Lanxess Deutschland Gmbh

Wolff Walsrode Ag

Reinhard Langer

Hans-Josef Buysch

Paul Wagner

Alexander Klausener

Gerhard Darsow

Lars Rodefeld

Gerd-Michael Petruck

Ursula Pentling

Otto Immel

Manfred L Gallus

Heinrich Grzinia

Leslaw Mleczko

Franz-Josef Mais

Norbert Schon

Sigurd Buchholz

Michael Dockner

Ulrich Notheis

Lutz Frohn

Karl Heinz Neumann

Stephan Ratsch

Anke Beckmann

Helmut Waldmann

Lothar Puppe

Klaus Szablikowski

Martin Melchiors

Wieland Hovestadt

Eberhard Zirngiebl

Wolfgang Koch

Heinz Landscheidt

Christine Mendoza-Frohn

Jorg-Dietrich Jentsch

Herbert Emde

Herbert Gebauer

Wolfram Kissener

Heiko Beckhaus

Burkhard Lachmann

Joerg-Dietrich Jentsch

Franz-Ulrich Von Gehlen

Christoph Tiburtius

Marielouise Schneider

Nikolaus Müller

Martin Lohrie

Bernd Pennemann

Günter Rauchschwalbe

Matthias Gotta

Andreas Schulze Tilling

Bettina Hölzer

The present invention relates to the industrial production of vinylene carbonate (VC) by elimination of hydrogen chloride from chloroethylene glycol carbonate (CGC) with tertiary amines in the absence of relatively large amounts of additional solvent.

Process for producing vinylene carbonate

The present invention relates to the industrial production of vinylene carbonate (VC) by eliminating hydrogen chloride from chloroethylene glycol carbonate (CGC) or solid catalysts in the gas phase, the reaction being carried out over a catalyst bed agitated by thorough mixing.

The present invention relates to the technical purification of vinylene carbonate (VC) by means of a simple thermal treatment with organic compounds which possess amidic nitrogen-hydrogen bonds, followed by a distillation and a melt crystallization. In this way VC of ultra-high purity is obtained. The high-purity vinylene carbonate can be stored and transported without stabilizer.

High-purity vinylene carbonate and a method of purifying vinylene carbonate

The present invention relates to the industrial purification of vinylene carbonate (VC). It was found that it is advantageous to subject the VC to be purified, before the purifying distillation, to a simple thermal treatment with organic compounds which have amidic nitrogen-hydrogen bonds.

Method of purifying vinylene carbonate

The invention relates to a method for the thermal decarboxylation of dicarboxylic acids, in particular to 3,4-ethylene dioxythiophene-2,5-dicarboxylic acid as an educt. According to said method the educt is used in solid form and/or the reaction is carried out in the presence of a plurality of fluidised bed bodies. No solvents are used in the reaction and the decarboxylation product that is formed during the reaction is carried away from the reaction zone in gaseous form.

Method for the decarboxylation of dicarboxylic acids

The present invention relates to an improved process for preparing cyclopropanecarboxylic acid and alcohols.

Process for hydrolysing cyclopropanecarboxylic esters to the free acid

The present invention relates to the preparation of nitrobenzoic acids by oxidizing particular nitrotoluenes, nitrobenzyl alcohols, esters and/or ethers in the presence of nitric acid at elevated temperature and elevated pressure. It has been found that the particular nitrotoluenes, nitrobenzyl alcohols, esters and/or ethers may be oxidized particularly reliably and in high yields using nitric acid to the benzoic acid derivatives when they are metered into the nitric acid.

Method for producing substituted nitro benzoic acids by oxidation of corresponding nitro toluenes, nitro benzyl alcohols, esters and/or ethers

2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30&#xb0; C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.

Process for preparing 2-alkyl-3-aryl- and -heteroaryloxaziridines and novel 2-alkyl-3-aryloxaziridines

The present invention relates to a process for the preparation of 2-halo-6-nitrobenzoic acids by oxidation of 2-halo-6-nitro-benzyl alcohols, esters, ethers, or mixtures thereof with nitric acid and to the use of this process as a step in the preparation of 2-halo-6-nitrobenzoic acids from 2-halo-6-nitrotoluenes.

Method for producing 2-halo-6-nitrobenzoic acids

Method for producing substituted nitro benzoic acids by oxidation of corresponding nitro toluenes, nitrol benzyl alcohols, esters and/or ethers

Method for producing 2,3,5,6-tetrahalogen-xylyidene compounds

2-Alkyl-3-aryl- or -heteroaryloxaziridines are prepared in a particularly advantageous manner by oxidizing corresponding N-alkyl-aryl- or -heteroarylaldimines with an aromatic percarboxylic acid or a salt thereof in the presence of water, a water-soluble base, and a water-miscible solvent, at temperatures below 30&deg; C. Using this method, it is also possible to obtain novel 2-alkyl-3-aryloxaziridines.

Process for preparing 2-alkyl-3aryl-and-heteroaryloxaziridines and novel 2-alkyl-3-aryloxaziridines

Method for producing 4-chlorobiphenyl and 4-chlorobiphenyl-specific specifications

The invention relates to a process for the preparation of d,l-menthol by catalytic hydrogenation of compounds which have the carbon skeleton of menthane containing at least one double bond and are 3-substituted by oxygen and/or of menthone or isomenthone or mixtures of such compounds using hydrogen at temperatures of 100 to 200&deg; C. and at hydrogen partial pressures between 2 and 50 bar and/or by rearrangement of menthol stereoisomers in the presence of hydrogen at temperatures of 0 to 140&deg; C. and at hydrogen partial pressures between 0.1 and 20 bar in the presence of noble-metal-containing catalysts.

Process for the preparation of d,I-menthol

Continuous method for producing aromatic amines

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Krefeld, Germany

Reinhard Langer