Evonik Operations Gmbh

Rohm Gmbh

Evonik Roehm Gmbh

Roehm Gmbh

Evonik Degussa Gmbh

Evonik Rohm Gmbh

Marcel Treskow

Steffen Krill

Thorben Schütz

Alexander May

Belaid Ait Aissa

Patrik Hartmann

Marita Kaufmann

Maik Caspari

Silvia Beyer

Doris Saal

Andrea Wittkowski

Günther Gräff

Marc Becker

Florian Zschunke

Martin Koestner

Johannes Vorholz

Andreas Weber

Marcus Denger

Norbert Hoffmann

Joerg Becker

Gabriel Avella

Diego Carambia

Willi Ploesser

Michael Schnabel

Martin Glock

Tim Bleith

Jerald Andrew Jones

Zoe Zegers

Kevin Lackey

Ghanem Sabeeh

Thorben Schutz

Torsten Krüger

Jörg Becker

Martin KÖSTNER

Isabelle Klein

Nikolaos Papadopoulos

Willi PLÖSSER

The present invention is to storage-stable compositions containing glycerol (meth)acrylate carboxylic esters, carboxylic acids and, optionally, Broensted acids.

Glycerol (meth)acrylate carboxylic ester having a long shelf life

A process prepares glycerol carbonate (meth)acrylate by transesterification of methyl (meth)acrylate with glycerol carbonate, in the presence of a zirconium acetylacetonate catalyst. The catalyst is pretreated with 2% by weight to 25% by weight of water, based on the amount of catalyst.

Process for preparing glycerol carbonate (meth)acrylate

The invention relates to a method for preparation of (meth)acrylic acid esters from (meth)acrylic acid anhydrides. Wherein the method for preparation of the (meth)acrylic acid ester, comprises at least step (a) as follows: (a) reacting a (meth)acrylic acid anhydride of Formula (I): wherein Ris a hydrogen atom or a methyl group; with a substrate in the presence of a first catalyst to form a product mixture comprising the (meth)acrylic acid ester; and wherein:

Preparation of (meth)acrylic acid esters

A process can be used for producing a distillate product with a methanol concentration greater than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl (meth)acrylate, from a mixture with a methanol concentration less than the concentration of methanol in the minimum boiling azeotrope of methanol and methyl (meth)acrylate, in a distillation column. A transesterification process for preparing C- to C-alkyl, aryl or alkenyl (meth)acrylates from methyl (meth)acrylate is also provided.

Process for separation of methanol and methyl (meth)acrylate

The invention relates to a method for preparing C—H acidic (meth)acrylates and the uses thereof.

Method for preparing C-H acidic (meth)acrylates

The invention relates to a method for preparation of (meth)acrylic acid esters from (meth)acrylic acid anhydrides. The method involves: reacting a (meth)acrylic acid anhydride of Formula (I):

A process for producing methacrylic acid or a methacrylic acid ester including, producing acrolein, reacting the produced acrolein with hydrogen to produce propanal, reacting the propanal with formaldehyde to produce methacrolein, and oxidizing the methacrolein in the presence of an oxygen containing gas and optionally an alcohol, to methacrylic acid or a methacrylic acid ester.

Process for producing methacrylic acid or methacrylic acid esters

The invention relates to a process for preparing N-methyl(meth)acrylamide and to the uses thereof.

Process for preparing N-methyl(meth)acrylamide

The invention relates to a method for preparing keto-functionalized aromatic (meth)acrylates.

Method for preparing keto-functionalized aromatic (meth)acrylates

The present invention describes storage-stable glycerol (meth)acrylate carboxylic esters and a method for preparing these esters.

The invention relates to a method for preparation of diesters from anhydrides of carboxylic acids.

Preparation of diesters of (meth)acrylic acid from epoxides

A process for preparing methyl methacrylate by direct oxidative esterification of methacrolein has elevated yields compared to known processes. Methyl methacrylate (MMA) is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA), which can be produced by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic, and environmentally friendly processes for preparing methyl methacrylate. A superior workup of the reactor output from the oxidative esterification of methacrolein allows specific by-products to be isolated and then additionally converted to alkyl methacrylates, especially to MMA.

Process for preparing MMA in high yields

The present invention relates to a novel process for oxidative esterification, generally for reaction of aldehydes with alcohols in the presence of oxygenous gases directly to give the corresponding ester in the presence of a heterogeneous catalyst, by means of which, for example, (meth)acrolein can be converted to methyl (meth)acrylate. The new catalyst has titanium dioxide as the main component of the support material. The catalysts are especially notable for high mechanical and chemical stability and for good catalytic performance even over very long periods. The process is an improvement in the catalyst service life, activity and selectivity over prior art catalysts which lose activity and/or selectivity relatively quickly in continuous operation in media having even a small water content.

Catalyst for the oxidative esterification of aldehydes to carboxylic esters

The present invention relates to a process for preparing alpha-hydroxycarboxylic esters proceeding from hydrogen cyanide, wherein the ammonia formed in the step of alcoholysis of the corresponding alpha-hydroxycarboxamide is recycled into a hydrogen cyanide preparation process after a purification step.

Method for preparing alpha-hydroxycarboxylic acid esters in which ammonia is recycled

The present invention describes a process for preparing alpha-beta-unsaturated carboxylic acids by dehydration of hydroxycarboxylic or alkoxycarboxylic acids which are substituted in the alpha position, in particular 2-hydroxyisobutyric acid, while avoiding accumulation of by-products and additives.

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Darmstadt, Germany

Marcel Treskow