Evonik Roehm Gmbh

Evonik Rohm Gmbh

Roehm Gmbh Chemische Fabrik

Thomas Kehr

Joachim Knebel

Guido Protzmann

Thorben Schuetz

Gerhard Koelbl

Harald Trauthwein

Guenther Lauster

Bardo Schmitt

Klaus Gottmann

Guenter Westhaeuser

Wolfgang Klesse

Werner Ude

Dirk Broell

Benedikt Laux

Christian Maul

Gerhard Kölbl

Ingo Sander

Martina Ebert

Dieter Bathen

Hans-Gerhard Stadler

Reinhold Martin

Peter-Joseph Arndt

Günter Westhäuser

Günter Lauster

Günther Lauster

The present invention relates to a process for preparing ethylene glycol dimethacrylate, which comprises transesterification of ethylene glycol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising lithium amide (LiNH) and lithium chloride (LiCl) is used as catalyst. The process of the invention makes it possible to prepare ethylene glycol dimethacrylate particularly inexpensively and in a very high purity.

Method for producing ethylene glycol dimethacrylate

The invention relates to a process for continuously preparing N-alkyl(meth)acrylamides by reacting alkyl(meth)acrylates with high-boiling amines. A catalyst activation and specific workup technique achieve product qualities which have not been achieved to date. In addition, very high space-time yields and overall yields can be achieved.

Method for continuously producing alkylamino(meth)acrylamides

The present invention relates to a process for preparing allyl methacrylate, comprising the reaction of allyl alcohol with an ester of methacrylic acid, wherein the reaction is catalyzed by zirconium acetylacetonate. The process according to the invention enables particularly favorable preparation of allyl methacrylate with a very high purity.

Method for synthesizing allyl methacrylate

The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.

Method for producing (meth)acrylates

The present invention relates to a process for preparing butanediol dimethacrylates, which comprises the transesterification of butanediol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising at least one lithium compound and at least one calcium compound is used as catalyst, at least one of the compounds of lithium and/or of calcium is an oxide, a hydroxide, an alkoxide having from 1 to 4 carbon atoms or a carboxylate having from 1 to 4 carbon atoms and at least part of the reaction is carried out in the presence of an effective amount of water. The process of the invention makes a particularly inexpensive preparation of butanediol dimethacrylates having a very high purity possible.

Method for producing butanediol dimethacrylates

The invention relates to a method of obtaining water-free 2-trimethylammoniumethyl methacrylate chloride (TMAC) characterized in that an aqueous TMAC solution is subjected to the following operations:

Method of obtaining water-free 2-trimethylammoniumethyl methacrylate

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Muehltal, Germany

Thomas Kehr