Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Lutz Heuer

Winfried Joentgen

Torsten Groth

Martin Kugler

Nikolaus Muller

Peter Wachtler

Hermann Uhr

Heinrich Schrage

Heinz-Joachim Rother

Klaus-Peter Heise

Paul Wagner

Guido Steffan

Hans-Ulrich Buschhaus

Roland Kleinstuck

Klaus Sasse

Hans-Joachim Traenckner

Franz Kunisch

Ulrich Liesenfelder

Eberhard Zirngiebl

Michael Schwamborn

Michael Sperzel

Hans-Georg Pirkl

Thomas Menzel

Klaus G Stunkel

Volker Glock

Gerd Schmitz

Andreas Sattler

Michael Herzhoff

Alexander Henseler

Martin Mechelhoff

Ralf-Johann Moritz

Ute Wollborn

Uwe Boeger

Stylianos Savakis

Helmut Diekmann

Reinhold Brink

Karl-Hermann Brucher

Joachim-Reinhard Wesener

Johannes Kanellakopoulos

Sven Kuhlmann

Oliver Pfohl

Eszter Farkas

Uwe Böger

Disclosed is a method for preparing polyesters, comprising  where at least one ortho position of the two phenyl rings in the formula (II) or the phenyl ring in the formula (I) must be substituted by a secondary or tertiary radical.

Method for the preparation of polyesters

A compressor system and method for the isothermal compression of industrial gases includes a compression cylinder into which an industrial gas having impurities can be introduced and compressed via a displacement fluid, and an expansion space for the desorption of impurities from at least part of the displacement fluid after the displacement fluid sorbs impurities from the gas during compression in the compression cylinder. The displacement fluid may compress the gas and sorb contaminants from the gas, and following the compression, at least a portion of the displacement fluid may be conducted to an expansion chamber to desorb the impurities from the fluid and remove the impurities from the system.

Compressor and method for compressing technical gases

The invention relates to a process for rectificative separation of compositions of matter containing diastereomers of 2-isopropyl-5-methylcyclohexanol by using ionic liquids as extractants.

Separation of isomeric menthol compounds

The present invention relates to a process for the preparation of 4-isopropyl-3-methylphenol (p-thymol) from distillation residues of thymol production.

Method for producing parathymol

The present invention relates to a method for producing 4-isopropyl-3-methyl-phenol by alykylizing meta-cresol, distilling, and crystallizing.

Dialkyl phenols

Corrosion inhibitor and method of protecting metallic materials in strongly alkaline medium by means of a corrosion inhibitor, characterized in that it contains an amine containing at least one CH group bound to the nitrogen.

Corrosion inhibitor for protecting metallic materials in strongly alkaline medium

There are described the use of &#x3b1;-(4-chlorophenyl)-&#x3b1;-(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol as a microbicide for the protection of industrial materials, and compositions containing this compound.

Microbicidal compositions

The invention relates to a process for preparing colourless dibenzylamine by adding ammonium chlorides or amines to the industrially obtained dibenzylamine and subsequent distillation.

Preparation of colourless dibenzylamine

Nitropyrazole amides of the formula (I) ##STR1## are prepared by reacting nitropyrazole esters of the formula (II) ##STR2## with ammonia.

Process for the preparation of a nitropyrazole amide

1-alkyl-pyrazole-5-carboxylic acid esters are prepared by reacting the enolate of a 2,4-diketocarboxylic acid ester with an N-alkylhydrazinium salt in the presence of a solvent. This process allows a particularly economic preparation of 1-alkyl-pyrazole-5-carboxylic acid esters in a simple manner and with only little formation of undesirable isomers.

Process for the preparation of 1-alkyl-pyrazole-5-carboxylic acid esters

Washing process using polycarboxylic acid salts

Fungicidal active compound combinations

Nitropyrazole esters of the formula ##STR1## in which R.sup.1 represents C.sub.1 -C.sub.6 -alkyl, are prepared by nitration of the corresponding pyrazole esters. The nitropyrazole esters permit the preparation of a known nitropyrazole amide in a particularly simple and economical manner and thereby improve the preparation of active compounds which are accessible from the nitropyrazole amide.

Process for the preparation of nitropyrazole esters

Use as antifreeze of polymers with recurring succinyl units

Timber preservative containing a copper compound

Growing community of inventors

Dormagen, Germany

Lutz Heuer