Clariant Finance (bvi) Limited

Clariant International Ltd

Clariant Corporation

Hoechst Aktiengesellschaft

Cassella Aktiengesellschaft

Uwe Nickel

Leonhard Unverdorben

Erwin Dietz

Joachim Weber

Klaus Kund

Juergen Patzlaff

Hans-Tobias Macholdt

Ruediger Baur

Olaf Schupp

Christian Wille

Wolfgang Bauer

Fritz Engelhardt

Manfred Schrod

Andreas Harz

Manfred Mayer

Klaus Saitmacher

Herbert Wille

Frank Alfter

R&uuml;diger Jung

Eberhard Grimm

Gunnar Tilch

The invention is directed to an electrophotographic toner or developer, powder coating, ink jet ink or an electronic media having an azo colorant prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.

Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic medias

Organic pigments are conditioned by introducing a liquid prepigment suspension into a miniaturized continuous reactor and thermally treating therein.

Conditioning of organic pigments

A process for preparing diketopyrrolopyrrole pigments comprises conducting the elementary steps of pigment synthesis (reaction and hydrolysis) in a miniaturized continuous reactor.

Preparation of diketopyrrolopyrrole pigments

A process for preparing alcoholic solutions of alkali metal alkoxides. The process includes reacting an alkali metal with an alcohol in a microreactor wherein the microreactor provides laminer flow.

Preparation of alcoholic solutions of alkali metal alkoxides

Azo colorants are prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.

Preparation of azo colorants in microreactors

A process for preparing disazo condensation pigments by diazotization of an aromatic amine, azo coupling with a coupling component to form an azocarboxylic acid or azodicarboxylic acid, formation of an azocarbonyl chloride or azodicarbonyl dichloride and condensation of the azocarbonyl chloride with an aromatic diamine or of the azodicarbonyl dichloride with an aromatic amine comprises effecting the acyl chloride formation and/or the condensation and optionally the diazotization and optionally the azo coupling in a microreactor.

Preparation of disazo condensation pigments in microreactors

The invention relates to an advantageous process for producing highly concentrated pigment presscakes which comprises concentrating a pigment suspension on a high-pressure filter press with a pressure of at least 16 bar to a pigment content of at least 50% by weight without adding nonionic surfactants which have a cloud point in water.

Process for producing highly concentrated pigment presscakes

The present invention relates to a process for the preparation of hydrophilic hydrogels of high swelling capacity by (co)polymerization of hydrophilic monomers in a fluidized bed apparatus.

Process for the preparation of hydrophilic hydrogels of high swelling

The present invention relates to a process for the preparation of benzothioxanthene dyestuffs and cyclisation of 3-(2'-aminophenylthio)-benzanathrones wherein the diazotisation and cyclisation are carried out simultaneously in polar, aprotic solvent in the presence of water.

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Bad Homburg, Germany

Uwe Nickel