Evonik Operations Gmbh

Evonik Oxeno Gmbh & Co. Kg

Johannes Knossalla

Robert Franke

Dirk Fridag

Peter Kucmierczyk

Alexander Brächer

Anna Chiara Sale

Ana Markovic

Frederik Gluth

Marc Schäpertöns

Detlef Selent

Kerstin Romeike

Matthias Beller

Guido Stochniol

Stephan Peitz

Frank Geilen

Armin Börner

Thomas Quandt

Thomas Quell

Ricarda Dühren

Fabian Höckelmann

Christoph Kubis

Martina Ludwig

Amin Borner

Stefan Drees

Jan Willaert

Ana Chiara Sale

A process for producing an oligomerization catalyst includes hydrothermal treatment. An oligomerization catalyst produced by the process is useful for the oligomerization of Cto Colefins.

Process for producing an oligomerization catalyst having a hydrothermal treatment step

The invention provides an improvement in terms of control and process technology for a method of continuous removal of a component from a liquid mixture using a membrane unit comprising at least one membrane stage. The improvement is that at least some of the overall permeate stream obtained is recycled to the feed vessel and/or beyond the feed vessel but upstream of the conveying device. The presently disclosed method can especially be used for separation of a homogeneously dissolved catalyst from a liquid reaction mixture.

Variable, self-regulating permeate recycling in organophilic nanofiltration

The invention relates to a process for separating one or more components from a mixture by a membrane separation in which—depending on the component to be separated—an acid or a base is added to the mixture before the membrane separation.

Process for separating one or more components from a mixture

Process for alkoxycarbonylation of ethylenically unsaturated compounds using benzene-based diphosphine ligands and aluminium triflate.

Process for alkoxycarbonylation of ethylenically unsaturated compounds using benzene-based diphosphine ligands and aluminium triflate

A process for preparing Caldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.

Process for preparing Caldehydes

A process can be used for preparing aldehydes from C2 to C20 olefins with a subsequent thermal separation for removal of the aldehyde formed. The process involves a membrane separation, which is preceded by performance of a gas exchange by which the proportion of the partial pressure represented by carbon monoxide or hydrogen is increased in order to reduce catalyst losses.

Optimized thermal separation by prior gas exchange

Bisphosphite ligands based on benzopinacol with an open outer unit, and the use thereof in hydroformylation.

Bisphosphite ligands based on benzopinacol with an open outer unit

Diphosphites having an open, 2,4-methylated outer unit and use thereof in hydroformylation.

Diphosphites having an open, 2,4-methylated outer unit

Bisphosphite ligands based on benzopinacol, and the use thereof in hydroformylation.

Bisphosphite ligands based on benzopinacol

Diphosphites having an open, 3-methylated outer unit and use thereof in hydroformylation.

Diphosphites with an open, 3-methylated outer unit

Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylation.

Mixture of bisphosphites having an open and a closed outer unit and the use thereof as a catalyst mixture in hydroformylation

Diphosphites having an open and a closed 2,4-methylated outer unit and use thereof in hydroformylation.

Diphosphites having an open and a closed 2,4-methylated outer unit

A process can be used for oligomerization of isobutene by conversion of an isobutene-containing hydrocarbon stream over an acid catalyst in at least one reaction stage, where a particular ratio of recycle to feed is employed.

Process for oligomerization of isobutene

The invention provides a process for preparing an alcohol by hydrogenating an ester which is obtained by alkoxycarbonylating a C2 to C20 hydrocarbon having at least one multiple bond, preferably having at least one olefinic double bond, in which the homogeneous catalyst system used is separated from the product mixture by means of membrane separation. In a development of the present invention, the ester thus formed is converted to another ester by transesterification and then hydrogenated.

Process for preparing an alcohol from hydrocarbons

The present invention provides a process for preparing aldehydes from C2 to C20 olefins using a subsequent membrane separation to separate the homogeneously dissolved catalyst system, wherein prior to the membrane separation a gas exchange that increases the partial pressure fraction of carbon monoxide or hydrogen is carried out in order to boost catalyst retention by the membrane.

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Schermbeck, Germany

Johannes Knossalla