Evonik Degussa Gmbh

Evonik Operations Gmbh

Rohm Gmbh

Florian Klasovsky

Thomas Haas

Thomas Tacke

Robert Franke

Matthias Beller

Steffen Krill

Steffen Schaffer

Frank Geilen

Mirja Wessel

Jan Christoph Pfeffer

Andreas Martin

Angela Koeckritz

Thomas Quandt

Sebastian Imm

Franz-Felix Kuppinger

Alexander May

Klaus-Dieter Vorlop

Marc Becker

Angela Köckritz

Daniel Helmut König

Jens Deutsch

Juergen Haberland

Andreas Jess

Arne Reinsdorf

Michael Volland

Michiel Janssen

Roger Sheldon

Min-Zae Oh

Wolfgang Korth

Michael Rimbach

Jürgen Haberland

Thomas Willke

Rene Schöbel

Patrick Wings

Hendrik Krauter

Jan Pfeffer

Ufuk Kockesen

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 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

Method for producing acrylic acid by dehydration of a Chydroxycarboxylic acid, characterized in that dehydration is achieved by contacting, at a temperature of more than 150&#xb0; C., the hydroxycarboxylic acid with a mixture which is liquid at this temperature and comprises at least one metal salt of a Chydroxycarboxylic acid, and water.

Method for producing acrylic acid

The invention relates to a method for the oxidation of a primary or secondary alcohol, preferably to form an aldehyde or ketone, comprising the following steps: a) providing a catalyst composition comprising at least one compound containing a nitroxyl radical, at least one NO source, at least one carbon or mineral acid or an anhydride of a carbon or mineral acid; b) producing a reaction mixture by adding at least one primary or secondary alcohol and a gas comprising oxygen and optionally one or more than one solvent to the catalyst composition from step a) or step e); c) incubating the reaction mixture from step b) at a temperature of between 0 and 100&#xb0; C. or at the boiling point of the solvent; d) simultaneously with or subsequent to step c): crystallizing the reaction product; and e) recovering the catalyst composition by removing the crystallized reaction product from the reaction mixture obtained in step d).

Continuously operable method for producing carbonyl compounds by means of a catalyst containing a nitroxyl radical

The present invention relates to a chemocatalytic liquid-phase process for the direct one-stage amination of alcohols to primary amines by means of ammonia in high yields using a catalyst system containing at least one transition metal compound and a xantphos ligand.

Process for the direct amination of alcohols using ammonia to form primary amines by means of a xantphos catalyst system

The invention relates to a process for preparing primary amines which comprises the process steps

Process for the direct amination of secondary alcohols with ammonia to give primary amines

The present invention relates to a process for preparing primary amines comprising the process steps

Process for homogeneously catalyzed, highly selective direct amination of primary alcohols with ammonia to primary amines with a high volume ratio of liquid phase to gas phase and/or high pressures

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Haltern am See, Germany

Florian Klasovsky