Evonik Roehm Gmbh

Evonik Rohm Gmbh

Patrick Peter

Torsten Balduf

Dirk Broell

Benedikt Laux

Christian Maul

Dirk Bröll

Claus Zimmer

Henning Schaefer

The invention relates to a process for preparing N-alkyl(meth)acrylamides by reacting (meth)acrylic anhydride with corresponding alkylamines.

Process for preparing N-alkyl(meth)acrylamides

The invention relates to a process for reclaiming methacrylic acid from a high-boiler phase in a heterogeneously catalysed gas phase oxidation of a C4-compound to methacrylic acid comprising the following steps a) Providing a high-boiler phase from a heterogeneously catalysed gas phase oxidation of a C4-compound to methacrylic acid b) Providing an aqueous phase, preferably organically loaded, from a heterogeneously catalysed gas phase oxidation of a C4-compound to methacrylic acid c) Mixing of components a) and b) optionally followed by filtration or centrifugation d) Adding an extraction media to the mixture from c) e) Subjecting the multiple-phase mixture from d) to at least one mixer-settler extraction process f) Recycling the organic phase from the last mixer-settler process back into the C4-process

Process for reclaiming methacrylic acid from a high-boiler phase and an aqueous phase

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Darmstadt, Germany

Patrick Peter