Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Oxeno Gmbh & Co. Kg

Benedikt Dercks

Robert Franke

Dirk Fridag

Corinna Hecht

Michael Grass

Florian Boeck

Udo Lenz

Christoph Hiller

Christoph Ehlers

Frank Geilen

Armin Matthias Rix

Stefan Münzner

Horst-Werner Zanthoff

Alexander Brächer

Ana Markovic

Stefan Drees

Lena Altmann

Hanna Spohr

Martin Oldemeyer

Tonia Weber

A process for preparing aldehydes by a homogeneously catalysed hydroformylation of Cto Colefins involves withdrawing a biphasic stream (liquid/gaseous) and expanding in two stages. Before, between, or after the two stages, the liquid phase is cooled. Only after expansion and cooling is the homogeneously dissolved rhodium catalyst system separated from the residual stream.

Process for preparing aldehydes and cooling a stream of matter

The present invention relates to a method for preparing saturated C- and C-alcohols, wherein the separation of the C-alcohols and the C-alcohols is effected by means of at least one two-column system or by means of at least one dividing wall column.

Method for obtaining alcohols from aldehydes

The present invention relates to a method for preparing saturated C- and C-alcohols, wherein the ratio of C- to C-alcohols is controlled by a distillative separation of the aldehydes used.

Method for obtaining alcohols from aldehydes III

The present invention relates to a method for preparing saturated C- and C-alcohols, wherein the ratio of C- to C-alcohols is controlled by the diversion of substreams in individual method steps.

Method for obtaining alcohols from aldehydes II

The invention is concerned with the issue of how to produce n-pentanal by hydroformylation from feedstock mixtures comprising a small proportion of n-butene and a large proportion of n-butane. Specifically, solutions for further optimizing established processes for hydroformylation of such low-butene mixtures in terms of material utilization are sought. The present invention has for its object to enhance the material utilization of the feedstock mixture in the production of n-pentanal from feedstock mixtures having a small proportion of n-butene and a large proportion of n-butane. The process shall be capable of economic operation on an industrial scale. In particular an existing oxo plant shall be honed to achieve better raw material utilization. This object is achieved by a combination of a hydroformylation and a dehydrogenation, wherein said combination has the special feature that the dehydrogenation is arranged after the hydroformylation in the downstream direction and is thus markedly smaller than conventional dehydrogenations provided upstream. A skillful product removal effectively removes contaminants formed in the process.

Production of n-pentanal from low-butene feedstock mixtures

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Bochum, Germany

Benedikt Dercks