Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Kerstin Bodmann

Manuela Imig

Manfred Kaufhold

Manfred Neumann

Clemens Osterholt

Marianne Omeis

Günther Köhler

Jutta Hessing

Johannes Ruwwe

Oliver Meyer

Renate Paulczynski

Thomas Kuebelbaeck

Jürgen Fieker

Karl-Heinz Brühl

The invention relates to a process for preparing alkyl chlorides by reacting alcohols with gaseous hydrogen chloride in the presence of a catalyst, wherein the catalyst comprises at least one compound of the structure: wherein

Process for preparing alkyl chlorides

A process for stabilizing cyclobutanone derivatives, comprising adding at least one of an alkali metal carbonate, alkali metal oxide, alkaline earth metal carbonate, and alkaline earth metal oxide as a stabilizer to at least one cyclobutanone derivative of the structure where R, R, R, R, Rand Rare each independently hydrogen or an alkyl, aralkyl, cycloalkyl, aryl, alkylaryl, hydroxyl, alkoxy, halogen, cyano or carboxyl group; and the correspondingly stabilized cyclobutanone derivatives.

Process for stabilizing cyclobutanone derivatives

An unsaturated, cyclic orthoester is prepared by reacting an unsaturated carboxylic acid with glycidol, thereby obtaining a reaction mixture; and adding an orthoester to the reaction mixture, thereby obtaining said unsaturated, cyclic orthoester.

Process for preparing unsaturated, cyclic orthoesters

The present invention is directed to a process for the synthesis of monoalkylated C&#x2014;H acidic methylene group-containing compounds, such as malonic esters, and malonic ester nitriles.

Process for monoalkylation of C-H acidic methylene groups

A salt-free process for preparing cyclobutanone, including isomerizing cyclopropylmethanol, preferably in aqueous solution, in the presence of an acidic heterogeneous catalyst to form cyclobutanol and, preferably after extraction and removal of the extractant, dehydrogenating the cyclobutanol over a heterogeneous catalyst.

Salt-free preparation of cyclobutanone

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Baltschieder, Switzerland

Kerstin Bodmann