Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Industries Ag

Evonik Oxeno Gmbh & Co. Kg

Frank Geilen

Robert Franke

Dirk Fridag

Katrin Marie Dyballa

Dieter Hess

Matthias Beller

Kaiwu Dong

Ralf Jackstell

Helfried Neumann

Guido Stochniol

Dietrich Maschmeyer

Stephan Peitz

Armin Matthias Rix

Stefan Drees

Detlef Selent

Armin Börner

Markus Winterberg

Horst-Werner Zanthoff

Helene Reeker

Thomas Quandt

Alexander Brächer

Bart Hamers

Ana Markovic

Florian Klasovsky

Thomas Quell

Johannes Knossalla

Reiner Bukohl

Marc Becker

Frederik Gluth

Marc Schäpertöns

Markus Schwarz

Harald Häger

Galina Morales Torres

Jörg Schallenberg

Lena Altmann

Benedikt Dercks

Andreas Wolff

Andreas Jess

Joerg Schallenberg

Felix Gärtner

Arne Reinsdorf

Hermann-Josef Schulte-Althoff

Reiko Jennerjahn

Wolfgang Korth

Martin Oldemeyer

Fabian Höckelmann

Mathias Vogt

Samet Gülak

Xiangjie Fang

Matthias Leipold

Jorg Schallenberg

Benedikt Dereks

Jan Willaert

Tonia Weber

Martina Ludwig

Xianjie Fang

Ralph Jackstell

Marcus Uhlemann

Helfreid Neumann

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 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 a portion of the overall permeate stream is recycled to the feed vessel and/or beyond the feed vessel but upstream of the conveying device, and the remainder of the overall permeate stream is removed, with the recycled permeate having a higher concentration of the component to be separated off than the removed permeate. The presently disclosed method can especially be used for separation of a homogeneously dissolved catalyst from a liquid reaction mixture.

Variable and self-regulating permeate recycling in organophilic nanofiltration

A process for preparing aldehydes by a homogeneously catalyzed 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 in a three-stage removal.

A process is useful for the isomerization of Cto Colefins having an internal double bond into the corresponding olefins having a terminal double bond using a heterogeneous catalyst system of a silicon-aluminium mixed oxide composition.

Process for the isomerization of olefins

The invention relates to a process comprising the following process steps: where

Process for the alkoxycarbonylation of alcohols

A heat exchanger system can be used for removal or introduction of heat from or into a chemical reactor in which a chemical reaction is proceeding. The system further provides an apparatus for controlling the temperature of a reactor and a process for performing a chemical reaction, in each case using a heat exchanger system with a thermally insulated inner tube.

Apparatus for controlling the temperature of a reactor

Process comprising the following process steps:

Process for the alkoxycarbonylation of olefins in a medium having a low Br&#xf8;nsted acid concentration

The invention relates to a process comprising the following process steps: whereRis selected from &#x2014;(C-C)-alkyl, &#x2014;O&#x2014;(C-C)-alkyl, &#x2014;O&#x2014;(C-C)-aryl, &#x2014;(C-C)-aryl, &#x2014;(C-C)-cycloalkyl, &#x2014;(C-C)-heterocycloalkyl, &#x2014;(C-C)-heteroaryl;Ris selected from &#x2014;(C-C)-aryl, &#x2014;(C-C)-cycloalkyl, &#x2014;(C-C)-heterocycloalkyl, &#x2014;(C-C)-heteroaryl;Ris &#x2014;(C-C)-heteroaryl;and R, Rand Rmay each independently be substituted by one or more substituents selected from&#x2014;(C-C)-alkyl, &#x2014;(C-C)-cycloalkyl, &#x2014;(C-C)-heterocycloalkyl, &#x2014;O&#x2014;(C-C)-alkyl, &#x2014;O&#x2014;(C-C)-alkyl-(C-C)-aryl, &#x2014;O&#x2014;(C-C)-cycloalkyl, &#x2014;S&#x2014;(C-C)-alkyl, &#x2014;S&#x2014;(C-C)-cycloalkyl, &#x2014;COO&#x2014;(C-C)-alkyl, &#x2014;COO&#x2014;(C-C)-cycloalkyl, &#x2014;CONH&#x2014;(C-C)-alkyl, &#x2014;CONH&#x2014;(C-C)-cycloalkyl, &#x2014;CO&#x2014;(C-C)-alkyl, &#x2014;CO&#x2014;(C-C)-cycloalkyl, &#x2014;N&#x2014;[(C-C)-alkyl], &#x2014;(C-C)-aryl, &#x2014;(C-C)-aryl-(C-C)-alkyl, &#x2014;(C-C)-aryl-O&#x2014;(C-C)-alkyl, &#x2014;(C-C)-heteroaryl, &#x2014;(C-C)-heteroaryl-(C-C)-alkyl, &#x2014;(C-C)-heteroaryl-O&#x2014;(C-C)-alkyl, &#x2014;COOH, &#x2014;OH, &#x2014;SOH, &#x2014;NH, halogen.

Process for the alkoxycarbonylation of ethylenically unsaturated compounds with monophosphine ligands

Process for the alkoxycarbonylation of ethers

The invention relates to compounds of formula (I)  The invention further relates to Pd complexes comprising the compound according to the invention and to the use thereof in alkoxycarbonylation.

Monophosphine compounds and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compounds

The invention is concerned with catalysts for heterogeneous hydrogenation of oxo process aldehydes. The problem addressed by the invention is that of developing a catalyst containing neither chromium nor nickel. In addition, it is to enable the economically viable hydrogenation of aldehyde mixtures originating from industrial oxo processes on the industrial scale. For this purpose, the catalyst should not be reliant on costly precious metals such as Ru, Pd or Pt. This problem was solved by omitting the chromium and nickel in the preparation of a conventional Cu/Ni/Cr system, such that a catalyst wherein only copper occurs as hydrogenation-active component on the support material thereof, and not chromium or nickel, is obtained. What is surprising here is that a functioning catalyst for the purpose intended still arises at all even though two of three hydrogenation-active metals are omitted. However, this requires as necessary conditions that support material used is silicon dioxide and that the content of Cu and SiOin the active catalyst is set accurately within very tight limits.

Chromium- and nickel-free hydrogenation of hydroformylation mixtures

The production of 2-propylheptanol described here is effected via Rh-catalyzed hydroformylation of C-olefin to afford C-aldehyde, aldol condensation to afford the C-aldehyde and hydrogenation to afford the C-alcohol. The emphasis is on the hydroformylation and the ligand employed therein. The problem addressed by the invention is that of reducing the costs of 2PH production. This problem is solved when a cheaper catalyst system which simultaneously achieves a better regioselectivity is employed in the hydroformylation. This catalyst system contains rhodium as the central atom and is complexed with the ligand (1): 

Economical production of 2-propylheptanol

Compound of formula (I) where The invention also relates to Pd complexes of the compound according to the invention, and to the use thereof in an alkoxycarbonylation process.

1, 1' -bis(phosphino)ferrocene ligands for alkoxycarbonylation

The invention relates to a compound of formula (I) where  The invention further relates to precursors for preparation of the compound according to the invention, to Pd complexes comprising the compound according to the invention and to the use thereof in alkoxycarbonylation.

Ferrocene-based compounds and palladium catalysts based thereon for the alkoxycarbonylation of ethylenically unsaturated compounds

The invention deals with the separation of homogeneous catalysts from reaction mixtures with the help of organophilic nanofiltration. It is based on the object of indicating an option as to how organophilic nanofiltration can be used economically for separating off homogeneous catalysts from reaction mixtures if the separation-active material of the membrane satisfying the separation aim is not available in sufficiently large amounts or only at high cost. This object is achieved by taking into consideration a particular membrane performance indicator during the design and/or the execution of the corresponding membrane separation process.

Separation off of a homogeneous catalyst from a reaction mixture with the help of organophilic nanofiltration

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Haltern am See, Germany

Frank Geilen