Degussa Aktiengesellschaft

Oxeno Olefinchemie Gmbh

Peter Ernst Esser

Thomas Schiffer

Martin Roos

Georg Thiele

Franz-Felix Kuppinger

G&uuml;nter Steverm&uuml;er

Wilfried Bueschken

Georg Oenbrink

Bernd Guenzel

Lothar Kerker

Claus York Werninger

Hartmut Steinbeisser

J&ouml;rg Krissmann

A process for preparing salts of methallylsulfonic acid in which the reaction mixture produced from the sulfonation is diluted with water and neutralized with a base.

Process for preparing salts of methallylsulfonic acid

A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.

Ammoximation of ketones and work-up by pervaporation/vapor permeation

The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.

Work-up of the ammoximation products of ketones by liquid-liquid extraction in a ternary solvent system

Cyclic alcohols and ketones having from 7-16 carbon atoms are prepared by a process comprising oxidizing cycloalkanes having 7-16 carbon atom s in the presence of an oxygen-containing gas and a sparingly water-soluble and sparingly aliphatic or cycloaliphatic hydrocarbon-soluble transition metal catalyst of Group 6 to Group 12 combined with a boron compound, and separating the sparingly soluble transition metal catalyst by mechanical separation after completion of the reaction.

Process for preparing cyclic alcohols and ketones

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Aschheim, Germany

Peter Ernst Esser