Evonik Roehm Gmbh

Waters Corporation

Evonik Rohm Gmbh

Rubotherm Gmbh

Dieter Bathen

Joachim Knebel

Bardo Schmitt

Thorben Schütz

Thorben Schuetz

Guido Protzmann

Thomas Kehr

Christian Maul

Cornelia Will

Harald Trauthwein

Klaus Gottmann

Ingo Sander

Frieder Dreisbach

Tatjana Hayn

Reinhold Martin

The aim of the invention is to provide a commercially usable and inexpensive device and method with which a sorption enthalpy can be measured in a simple manner. This is achieved by a device for calorimetrically measuring sorption processes, comprising a sorption cell for receiving a sample, the sorption cell having a volume for filling with a sorption gas, and comprising a reference cell likewise for filing with the sorption gas. A measurement gas volume is arranged around the sorption cell for receiving a reference gas, and the reference cell is surrounded by a reference gas volume, which is likewise provided for receiving the reference gas. A gas connection is provided between the sorption cell and the reference cell in order to conduct sorption gas into the sorption cell and the reference cell such that a sorption reaction occurs with the sample in the sorption cell. Furthermore, a device is provided for measuring pressure differences between the measurement gas volume and the reference gas volume in order to carry out a calorimetric measurement of the sorption process on the sample in the sorption cell on the basis of a volume change of the reference gas in the measurement gas volume.

Device and method for calorimetrically measuring sorption processes

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

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Duisburg, Germany

Dieter Bathen