Huels Aktiengesellschaft

Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Werner Freitag

Martina Ortelt

Wilfried Paulen

Karin Sokolowski

Steffen Schaffer

Gerda Grund

Friedrich Georg Schmidt

Matthias Seiler

Peter Denkinger

Stefan Verseck

Stefan Bernhardt

Rainer Elm

Wolfgang Sasse

Werner Andrejewski

Matthias Orschel

Markus Schwarz

Bernd Ondruschka

Peter Duerre

Antje May

Ralf-Joerg Fischer

Hubert Johannes Bahl

Bernhard Huber

Christina Machate

Friedrich-Georg Schmidt

Andreas Berlineanu

Peter Scholz

Simone Lederle

Wilfried Schmidt

Peter Dürre

Ralf-Jörg Fischer

The invention describes a process for preparing acetone starting from acetyl-coenzyme A comprising process steps A. enzymatic conversion of acetyl-CoA into acetoacetyl-CoA B. enzymatic conversion of acetoacetyl-CoA into acetoacetate and CoA and C. decarboxylation of acetoacetate to acetone and CO, which is characterized in that the coenzyme A is not transferred in process step B to an acceptor molecule. In addition, process step B is surprisingly catalyzed by enzymes of the classes of acyl-CoA thioesterase, acyl-CoA synthetase or acyl-CoA thiokinase. A completely novel metabolic pathway is concerned, because the enzymatic hydrolysis of acetoacetyl-CoA without simultaneous transfer of CoA to a receptor molecule has never previously been described for any microbial enzyme.

Fermentative production of acetone from renewable resources by means of novel metabolic pathway

An epoxidized polyalkenylene is prepared reacting a polyalkenylene, an aqueous solution of 15 to 90% by volume of hydrogen peroxide and a carboxylic acid having from 1 to 3 carbon atoms in the presence of a catalyst which is phosphonic acid, a derivative of phosphonic acid or a mixture thereof, without addition of an organic solvent or water, to obtain the epoxidized polyalkenylene. The epoxidized polyalkenylene has a number-average molar mass of between 500 and 50 000 g/mol and an epoxide oxygen content of between 1 and 25 percent by mass.

Epoxidized polyalkenylenes and method for their preparation

A water-soluble or water-dispersible binder based on polybutadienes which is modified with at least 5% by weight of maleic anhydride and wherein at least 30% of the anhydride groups are present as imide groups from reaction with an amino carboxylic acid.

Aqueous binders based on polybutadiene

Ketone-aldehyde resins with wide compatibility, process for their preparation, and their use. The invention relates to ketone-aldehyde resins with wide compatibility comprising cycloaliphatic ketones and, in particular, formaldehyde and, if desired, further monomers, to a process for their preparation and to their use as hard resin in paints, printing inks and other coatings, especially in pigment preparations.

Ketone-aldehyde resin with wide compatibility, process for its

Non-aqueous ball point pen inks, which contain dyes, resins, solvents and additives which demonstrate improved rheological behavior under the most varied climatic conditions. Leaking and spotting are reliably avoided, and ink production is simplified. Alcohol-soluble cellulose derivatives are used as additives.

Non-aqueous ball point pen ink

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Dorsten, Germany

Werner Freitag