Rohmax Additives Gmbh

Evonik Rohmax Additives Gmbh

Evonik Oil Additives Gmbh

Stephan Massoth

Alexander Dardin

Markus Scherer

Detlef Bloos

Boris Eisenberg

Klaus Schimossek

Wolfgang Tschepat

Michael Neusius

Klaus Hedrich

Matthias Fischer

Guenther Graeff

Uwe Boehmke

Francois Acker

Stephan Fengler

Jean-Marc Beiner

Alain Roos

Valerie Dittgen

Bernd Amrhein

Volker Stephan

Dardin Alexander

François Acker

Valérie Dittgen

The present invention relates to processes for preparing carboxylic acid derivatives, comprising the reaction of at least one carboxylic acid and/or of a carboxylic acid derivative with at least one alcohol and/or an amine in the presence of a metal-containing catalyst, wherein, after the reaction has ended, the metal-containing catalyst is contacted with water and a superabsorbent, the contacting of the catalyst with the water leading to hydrolysis of the catalyst. The present invention further relates to the use of superabsorbents for removing a metal-containing catalyst from a mixture after hydrolysis of the catalyst.

Process for preparing carboxylic acid derivatives

The invention relates to a method for radical polymerization of one or several ethylenically unsaturated compounds, characterized in that it consists in providing at least 80.8 percent by weight ethylenically unsaturated compounds in relation to the total weight of the ethylenically unsaturated compounds, adding at least one polymerization initiator for radical polymerization in at least two steps, wherein more polymerization initiator is added in the second step than in the first.

Method for free-radical polymerization of ethylenically unsaturated compounds

The present invention relates to a polymer dispersion having high stability, comprising

Highly stable polymer dispersions and method for the production thereof

The invention relates to engine oil compositions with reduced deposit-formation tendency which contain between 0.05 and 10% by weight, in relation to the total weight of the engine oil composition, of an alkyl alkoxylate of formula (I), in which R 1 , R 2 and R 3 independently are hydrogen or a hydrocarbon rest with up to 40 carbon atoms; R 4 is hydrogen, a methyl or ethyl rest; L is a linking group; n is a whole number between 4 and 40; A is an alkoxy group with between 2 and 25 recurring units derived from ethylene oxide, propylene oxide and/or butylene oxide and comprises homopolymers and statistical copolymers of at least two of the above compounds; and z is 1 or 2. The nonpolar part of compound (I) of the formula (II) contains at least 9 carbon atoms. The invention also relates to the preparation of such engine oils and to the use of alkyl alkoxylates of formula (I) for the reduction of deposit formation.

Engine oil composition with reduced deposit-formation tendency

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Biblis, Germany

Stephan Massoth