Bayer Aktiengesellschaft

Thomas Essert

Nikolaus Muller

Helmut Fiege

Franz-Josef Mais

Guido Steffan

Johannes-Rudolf Jansen

Martin Hoch

Friedrich Durholz

Andreas Sattler

Jurgen Schneider

Catalyst system for the production of olefin (co)polymers

Arylidene-substituted alkylcycloalkanones are prepared from alkyl-substituted cycloalkanones by reaction with aromatic carbonyl compounds in the presence of a basic catalyst and water.

Process for the preparation of arylidene-substituted alkylcycloalkanones

2-Chloroacrylonitrile is prepared in a particularly advantageous and readily industrially practicable manner by chlorinating acrylonitrile and then thermally cleaving the 2,3-diehloropropionitrile formed, by chlorinating acrylonitrile in the presence of a catalyst system comprising dimethylformamide and pyridine and/or pyridine derivatives and subjecting the resulting crude 2,3-dichloropropionitrile to thermal cleavage in the presence of the same catalyst system without the addition of further catalysts.

Process for the preparation of 2-chloroacrylonitrile

2-Substituted cyclopentanones are prepared by reacting adipic ester with an alkoxide in the presence of an inert solvent, thus obtaining a salt of the cyclopentanone-2-carboxylic ester, alkylating this without isolation, thus obtaining a 2-alkyl-cyclopentanone-2-carboxylic ester and, without isolation, hydrolysing and decarboxylating this by treatment with an acid and heating.

Process for the preparation of 2-substituted cyclopentanones

A particularly advantageous process for the preparation of 2,2-dialkyl-arylidene-cycloalkanones is characterized in that 2-alkyl-arylidene-cycloalkanones are reacted with alkyl halides in the presence of metal hydroxides and tertiary alcohols.

Process for the preparation of 2,2 dialkyl-arylidene-cycloalkanones

Growing community of inventors

Overath, Germany

Thomas Essert