Oxeno Olefinchemie Gmbh

Huels Aktiengesellschaft

Evonik Oxeno Gmbh

Dietmar Gubisch

Alfred Kaizik

Wilfried Bueschken

Bernhard Scholz

Michael Grass

Hans-Gerd Lueken

Wilhelm Droste

Uwe Tanger

Uwe Ernst

Michael Woelk-Faehrmann

Joachim Schuler

Rudolf Nehring

Wilfried B&uuml;schken

Walter T&ouml;tsch

Klaus Armbrust

Gernard Ludwig

Michael Woelk-Fährmann

A process for preparing benzoic esters whose alkoxy groups have from 7 to 13 carbon atoms by reacting benzoic acid with at least one alcohol having from 7 to 13 carbon atoms, the water of reaction formed being removed during the esterification reaction by distillation, and the alcohol not converted in the esterification reaction being removed after the esterification reaction, in which the reaction takes place in the presence of a tin(II) compound as catalyst and, without treatment with a base, the catalyst and/or its derivatives is/are separated off by filtering or by centrifuging from the reaction mixture which remains after the unconverted alcohol has been separated off.

Method for producing benzoic acid esters

Carboxylic esters are prepared by a process, which comprises reacting dicarboxylic or polycarboxylic acids or their anhydrides with alcohols in a liquid medium with the concomitant removal of water formed by the esterification reaction by azeotropic distillation together with the alcohol in the medium, wherein the amount of liquid removed from the reaction medium by azeotropic distillation is replaced in whole or in part with the alcohol.

Process for preparing carboxylic esters

Process for the hydrogenation of hydroformylation mixtures

A process for the hydrogenation of reaction mixtures from the hydroformylation of C,to C,olefins using hydrogen on fixed catalysts at elevated temperature, in which the aldehydes, alcohols, formates and low-boilers are evaporated from the reaction mixture and passed in the vapor state over a support-free Cu/Cr catalyst.

A single-stage process is described that includes simultaneously, in a mixture containing an olefin; synthesis gas; a cobalt catalyst in an organic phase; and an aqueous cobalt salt solution; hydroformylating the olefin, and forming and extracting into the organic phase the cobalt catalyst from the aqueous cobalt salt solution. An apparatus is also described that includes a means for carrying out the process. The process is particularly suitable for preparing aldehydes and alcohols.

Process for the production of higher oxo alcohols

A process for preparing 2-ethylhexanol by the liquid-phase catalytic hydrogenation of 2-ethylhexenal and a catalyst for preforming this catalytic hydrogenation are disclosed.

Process for the preparation of 2-ethylhexanol by liquid-phase catalytic

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Marl, Germany

Dietmar Gubisch