Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Oxeno Gmbh

Evonik Rohm Gmbh

Evonik Oxeno Gmbh & Co. Kg

Thomas Quandt

Robert Franke

Guido Stochniol

Dietrich Maschmeyer

Alfred Kaizik

Stephan Peitz

Fabian Nadolny

Kurt-Alfred Gaudschun

Franz Nierlich

Peter Wasserscheid

Horst-Werner Zanthoff

Frank Geilen

Helene Reeker

Reiner Bukohl

Stephan Houbrechts

Silvia Santiago Fernandez

Florian Klasovsky

Christian Schulze Isfort

Georg Skillas

Armin Matthias Rix

Markus Winterberg

Johannes Knossalla

Hermann Siegert

Ralf Meier

Alexander May

Jürgen Herwig

Wilfried Büschken

Nicole Brausch

Marc Becker

Bernd Vogel

Kévin Micoine

Christian Boeing

Andreas Jess

Stefan Röder

Andreas Wolff

Hans-Gerd Lüken

Arne Reinsdorf

Hanna Hahn

Marco Haumann

Wolfgang Korth

Angela Heykamp

Angélique Bétard

Christian Böing

Asli Nau

Nadolny Fabian

Simon Walter

Christian Isfort Schulze

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 relates to an oligomerization catalyst comprising nickel oxide and silica-alumina support material and to a process for oligomerization of C3- to C6-olefins using the oligomerization catalyst.

Oligomerization catalyst and process for the production thereof

The invention relates to a catalyst for a process for removing mercaptans and optionally disulfides (if present) from hydrocarbon streams, in particular C4 streams, in the presence of higher dienes, in particular C5 dienes. At the same time, the invention also relates to a process for removing mercaptans and disulfides (if present) from hydrocarbon streams, in particular C4 streams, in one embodiment in the presence of 1-butene, by thioetherification of the mercaptans with polyunsaturated hydrocarbons, wherein the process is carried out in a reactor with addition of hydrogen in the presence of higher dienes, in particular Cdienes.

Catalyst and process for removing mercaptans from hydrocarbon streams

The invention relates to a process for producing an oligomerization catalyst comprising nickel oxide and a silicon-alumina support material, wherein the silica-alumina support material is in the ammonium form. The present invention further relates to a process for oligomerization of C3- to C6-olefins using the oligomerization catalyst produced according to the invention.

Process for producing an oligomerization catalyst

The invention relates to an oligomerization catalyst comprising nickel oxide and silica-alumina support material and to a process for oligomerization of C- to C-olefins using the oligomerization catalyst.

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

A catalyst composition is useful for producing a ketone from a compound containing at least one epoxide group, and the catalyst composition contains at least one precious metal; and at least one mixed oxide; wherein the mixed oxide contains zirconium dioxide and silicon dioxide; wherein the precious metal is supported and the support is not entirely made of the mixed oxide; and wherein a mass ratio of zirconium dioxide to silicon dioxide in the mixed oxide is 86:14 to 99.9:0.1.

Catalyst system for producing ketones from epoxides

The invention relates to a process for the preparation of alcohols by hydrogenation of aldehydes, in which use mixture comprising at least one aldehyde and at least one accompanying component is brought into contact, in the presence of hydrogen, with a heterogeneous catalyst, giving a product mixture which comprises at least the alcohol corresponding to the hydrogenated aldehyde, and at least one by-product, where the catalyst comprises a support material, and nickel and copper applied thereto. The invention also includes a chromium-free catalyst suitable for hydrogenating aldehyde mixtures with different chain lengths, in particular those which originate from different hydroformylations and can also comprise substances with C&#x2550;C double bonds.

Chromium-free hydrogenation of hydroformylation 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

The present invention relates to a catalyst for reacting carbonitriles with water, wherein the catalyst comprises at least 60% by weight of manganese dioxide with an empirical formula MnOx where x is in the range from 1.7 to 2.0, and at least one plasticizer. The present invention further relates to a process for preparing the catalysts detailed above and to a process for preparing carboxamides by reacting carbonitriles with water in the presence of the present catalyst.

Catalyst for reacting carboxylic acid nitriles

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

The invention relates to a method for producing higher hydridosilane wherein at least one lower hydridosilane and at least one heterogeneous catalyst are brought to reaction, wherein the at least one catalyst comprises Cu, Ni, Cr and/or Co applied to a carrier and/or oxide of Cu, Ni, Cr and/or Co applied to a carrier, the hydridosilane that can be produced according to said method and use thereof.

Process for preparing higher hydridosilanes

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.

Growing community of inventors

Marl, Germany

Thomas Quandt