Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Oxeno Gmbh

Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh & Co. Kg

Horst-Werner Zanthoff

Dietrich Maschmeyer

Robert Franke

Franz Nierlich

Stephan Houbrechts

Silvia Santiago Fernandez

Markus Winterberg

Thomas Quandt

Guido Stochniol

Wilfried Büschken

Meike Roos

Walter Luh

Dirk Fridag

Stephan Peitz

Frank Geilen

Kurt-Alfred Gaudschun

Christian Schulze Isfort

Lena Altmann

Klaus Huthmacher

Katrin Marie Dyballa

Christoph Weckbecker

Harald Haeger

Michael Grass

Helene Reeker

Franz-Felix Kuppinger

Hubert Redlingshöfer

Jürgen Mosler

Franck Furno

Günther Bub

Andreas Sabbagh

Jan-Olaf Barth

Bart Hamers

Stefan Nordhoff

Nicole Brausch

Udo Knippenberg

Corinna Hecht

Julia Strautmann

Jörg Schallenberg

Christian Boeing

Harald Häger

Christoph Weber

Andrea Heinroth

Julia Bauer

Jan Benedikt Metternich

Georg Skillas

Matthias Blug

Jörg Sauer

Benedikt Dercks

Jens Busse

Joerg Schallenberg

Sascha Hoch

Thomas Schneider

Felix Gärtner

Thorsten Schwärtzke

Günter Latoschinski

Hanna Hahn

Jens Elsner

Hanna Spohr

Jorg Schallenberg

Anita Völkel

Udo Robers

Fikri Sen

Wolfram Calvet

Bernhard Kaiser

Wolfram Jaegermann

Christian Böing

Oliver Becker

Markus Weber

Dennis Fruhling

Asli Nau

Ralf Mayer

Dennis FRÜHLING

Christian Isfort Schulze

Busse Jens

Sachsa Hoch

Michael Bernd Fricke

Harald Hager

The present invention relates to a process for producing alcohols by hydrogenation of C4 to C20 aldehydes. The process according to the invention is performed in two consecutive hydrogenation stages, wherein the first hydrogenation stage employs an activated metal catalyst based on a nickel metal foam and the second stage employs a supported catalyst containing a catalytically active component from the group consisting of nickel, copper, chromium and mixtures thereof.

Process for the hydrogenation of aldehydes in at least two hydrogenation stages

A method for the isomerization of alpha-olefins to the corresponding internal olefins uses a heterogenous catalyst containing silicon-aluminum mixed oxide in a continuous fixed-bed operation mode.

Process for heterogeneous isomerization of alpha-olefins

The present invention relates to a process for producing alcohols by hydrogenation of C13 aldehydes. The process according to the invention is performed in two consecutive hydrogenation stages, wherein the first hydrogenation stage employs an activated metal catalyst based on a nickel metal foam and the second stage employs a supported catalyst containing a catalytically active component from the group consisting of nickel, copper, chromium and mixtures thereof.

Process for hydrogenation of C13 aldehydes in at least two hydrogenation stages

The present invention relates to a process for producing alcohols by hydrogenation of C9 aldehydes. The process according to the invention is performed in two consecutive hydrogenation stages, wherein the first hydrogenation stage employs an activated metal catalyst based on a nickel metal foam and the second stage employs a supported catalyst containing a catalytically active component from the group consisting of nickel, copper, chromium and mixtures thereof.

Process for hydrogenation of C9 aldehydes in at least two hydrogenation stages

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

A process for the combined preparation of a butene and an octene from ethene, proceeds by: a) providing a solvent having a boiling point or boiling range above the boiling points of the butenes and below the boiling points of the octenes and wherein the solvent is an inert solvent or is hexene alone or is hexene admixed with pentane or hexane or heptane or is a mixture of pentane, hexane, and heptane; b) providing a first feed mixture containing at least the solvent and ethene dissolved therein; c) providing a second feed mixture containing at least hexene, the solvent and also ethene dissolved in the solvent and/or in the hexene; d) transferring the first feed mixture into a first synthesis and the second feed mixture into a second synthesis, wherein the first and second syntheses are physically separated from one another; e) oligomerizing of at least part of the ethene present in the first feed mixture in the presence of a first heterogeneous catalyst and in the presence of the solvent in the first synthesis to give a first reaction mixture comprising at least the solvent, butene and hexene; f) separating a butene-containing low boiler fraction from the first reaction mixture or from a stream based on the first reaction mixture; g) separating an intermediate boiler fraction containing hexene and the solvent from the first reaction mixture or from a stream based on the first reaction mixture; h) using at least part of the intermediate boiler fraction in the course of providing the second feed mixture; and i) reacting at least part of the ethene present in the second feed mixture with at least part of the hexene present in the second feed mixture in the presence of a second heterogeneous catalyst and in the presence of the solvent in the second synthesis to give a second reaction mixture comprising at least octene and the solvent.

Combined preparation of butene and octene from ethene

The invention relates to a photoelectrochemical cellfor light-driven production of hydrogen and oxygen, especially from water or another electrolyte based on aqueous solution, having a photoelectric layer structureand an electrochemical layer structurein a layer construction, where&#x2014;the photoelectric layer structurefor absorption of lightuninfluenced by the electrolyteforms a front sideof the layer structure, and&#x2014;the electrochemical layer structure, for accommodation of the electrolyte, forms a reverse sideof the layer construction, and&#x2014;a conductive and corrosion-inhibiting coupling layerforms electrical contact between the photoelectric layer structureand the electrochemical layer structurein the layer construction, where&#x2014;the electrochemical layer structurehas an electrode structure of a front electrodeand an electrode structure of a rear electrode, between which is arranged an ion exchange layersuch that an integrated layer constructionis formed with the ion exchange layerin contact with the electrode structure of the front electrodeformed for conversion of the electrolyteand/or with the electrode structure of the rear electrode

Photoelectrochemical cell, system and process for light-driven production of hydrogen and oxygen with a photoelectrochemical cell, and process for producing the photoelectrochemical cell

The invention relates to a process for preparing an ester mixture, in which an n-butene-containing feed mixture having a composition which changes over time is first oligomerized and then converted by hydroformylation, hydrogenation and esterification to an ester mixture. In this process, an approximation of the actual viscosity of the ester mixture is determined. The problem that it addresses is that of specifying a comparatively simple process which enables conversion of an n-butene with a variable composition over time to an ester mixture having a viscosity which can be kept very substantially constant over a long period even when an inconstant Csource which delivers fluctuating qualities over this period is utilized. This is achieved through controlled use of a second raw material, namely ethene. It has been found that the viscosity of n-butene-based ester mixtures can be influenced by controlled use of ethene in the preparation of the ester precursors. Specifically, the invention proposes two measures by which the ethene can be used: either directly as Colefin or as Colefin after prior separate oligomerization.

Influencing the viscosity of N-butene-based ester mixtures by controlled use of ethene in the preparation of the ester precursors

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

The present invention relates to mixed oxide compositions, to the use thereof as a catalyst for cleavage of alkyl tert-alkyl ethers or tertiary alcohols, and to a process for cleaving alkyl tert-alkyl ethers or tertiary alcohols to isoolefins and alcohol or water.

Mixed oxide compositions and process for preparing isoolefins

Silicon-aluminum mixed oxide powder having a weight ratio of (AlO/SiO)in the total primary particle of from 0.003 to 0.05, a weight ratio (AlO/SiO)of the primary particles in a surface layer having a thickness of about 5 nm which is less than in the total primary particle and a BET surface area of from 50 to 250 m/g. It is prepared by igniting one or more silicon compounds selected from the group consisting of CHSiCl, (CH)SiCl, (CH)SiCl and (n-CH)SiCl, a hydrolysable and oxidizable aluminum compound, at least one fuel gas and air and burning the flame into a reaction chamber, subsequently separating the solid from gaseous materials and subsequently treating the solid with water vapor. The silicon-aluminum mixed oxide powder can be used as catalyst.

Silicon-aluminum mixed oxide powder

Provided is a process for producing an aldehyde from an alkylene. The process includes (a) photocatalytically dehydrogenating at least one alkane to obtain a mixture comprising at least one olefin and hydrogen, (b) adding carbon dioxide and hydrogen to the mixture, and (c) hydroformylating the olefin to at least one aldehyde. The process also includes converting carbon dioxide and hydrogen into water and carbon monoxide prior to the hydroformylating. In addition, the conversion of carbon dioxide and hydrogen into water and carbon monoxide is performed by a reverse water gas shift reaction.

Energy efficient synthesis of aliphatic aldehydes from alkenes and carbon dioxide

The present invention relates to a process for preparing unsaturated aldehydes or unsaturated carboxylic acids by heterogeneous catalytic gas phase oxidation of unsaturated or saturated hydrocarbons, comprising the process steps of: i) providing a gas mixture comprising a saturated hydrocarbon and catalytically dehydrogenating the saturated hydrocarbon in the gas phase to obtain a gas mixture comprising an unsaturated hydrocarbon in a dehydrogenation reactor having a dehydrogenation catalyst material; or ii) providing a gas mixture comprising oxygen and an unsaturated hydrocarbon; iii) catalytically oxidizing the unsaturated hydrocarbon obtained in process step i) or provided in process step ii) in the gas phase to obtain a gas mixture comprising an unsaturated aldehyde in a first oxidation reactor having a first oxidation catalyst material; wherein at least one of the reactors selected from the dehydrogenation reactor, the first oxidation reactor and the second oxidation reactor comprises at least one foam body.

Use of foam bodies in oxidation reactors for preparing unsaturated aldehydes or carboxylic acids

The present invention relates to a process for preparing a catalyst which, in a formal sense, comprises 0.1 to 20% by mass of alkali metal and/or alkaline earth metal oxide, 0.1 to 99% by mass of oxide and 0.1 to 99% by mass of silicon dioxide, which is characterized in that it aluminum comprises the steps of treating an aluminosilicate with an aqueous alkali metal and/or alkaline earth metal salt solution under acidic conditions and calcining the aluminosilicate treated with aqueous alkali metal and/or alkaline earth metal salt solution, and to a catalyst which is obtainable by this process and, in a formal sense, comprises alkali metal and/or alkaline earth metal oxide, aluminum oxide and silicon dioxide, which is characterized in that the catalyst, in a formal sense, has a content of alkali metal and/or alkaline earth metal oxides of 0.5 to 20% by mass, a content of aluminum oxide of 4 to 30% by mass and a content of silicon dioxide of 60 to 95% by mass, and to the use of this catalyst in a process for preparing isoolefins having 4 to 6 carbon atoms by catalytic gas phase cleavage of tertiary alcohols or alkyl tert-alkyl ethers.

Catalyst and process for preparing isoolefins

A catalyst, useful in the preparation of isoolefins and containing 0.1 to 20% by mass of an alkali metal oxide, an alkaline earth metal oxide and mixtures thereof; 0.1 to 99% by mass of aluminum oxide; and 0.1 to 99% by mass of silicon dioxide, is prepared by a) treating an aluminosilicate with an aqueous alkali metal salt solution, an alkaline earth metal salt solution and mixtures thereof, under acidic conditions, to obtain a treated aluminosilicate; and b) calcining the treated aluminosilicate, to obtain the catalyst.

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Muelheim a.d. Ruhr, Germany

Horst-Werner Zanthoff