Evonik Roehm Gmbh

Forschungszentrum Karlsruhe Gmbh

Joerg Becker

Alexander May

Martin Koestner

Steffen Krill

Hermann Siegert

Marcel Treskow

Matthias Franzreb

Bernd Vogel

Willi Ploesser

Joerg Schallenberg

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.

Method for dehydrating alpha-substituted carboxylic acids

The invention relates to a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid, comprising the steps of A) reacting a carbonyl compound with hydrocyanic acid to produce a hydroxycarboxylic acid nitrile, B) hydrolysis of the hydroxycarboxylic acid nitrile obtained in step A) in the presence of a catalyst comprising manganese dioxide, wherein a molar excess of carbonyl compound is used in relation to the hydrocyanic acid to react the carbonyl compound with hydrocyanic acid according to step A), and the reaction mixture obtained in step A) is not purified by distillation before the hydrolysis according to step B) is carried out. The invention furthermore relates to a method for producing alkyl(meth)acrylates from polymers, moulding compounds and moulded bodies, wherein a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid is carried out in accordance with the method described above.

Method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid

A method for magnetically assisted extraction of a target substance from an aqueous solution containing a plurality components includes mixing a surfactant and functional magnetic particles having affinity for the target substance into the aqueous solution containing the target substance so as to bind the target substance to the functional magnetic particles and form a particle-containing single-phase aqueous surfactant solution. The particle-containing single-phase aqueous surfactant solution is transitioned to a two-phase state, a first particle- and surfactant-containing disperse phase being formed within a surrounding second phase. The first particle- and surfactant-containing disperse phase and the surrounding second phase are separated using a magnetic field. The first particle- and surfactant-containing disperse phase are separated.

Method for magnetically supported extraction

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Darmstadt, Germany

Joerg Becker