Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Huels Aktiengesellschaft

Evonik Functional Solutions Gmbh

Bayer Aktiengesellschaft

Evonik Operations Gmbh

Philip Morris Products S.a.

Ruhr-universitat Bochum

Manfred Neumann

Phillip R James

Oliver Erpeldinger

Volker Brehme

Stefanie Rinker

Felix Nissen

Benjamin Willy

Dirk Roettger

Michael Keup

Guenther Koehler

Clemens Osterholt

Marianne Omeis

Frank Kraushaar

Armin Matthias Rix

Rolf Schneider

Frank Bauer

Matthias Seiler

Christoph Theis

Niklas Paul

Patrik Stenner

Moritz Schröder

Günther Köhler

Jörn Rolker

Daniel Witthaut

Wolfgang Kleemiss

Heinz-Werner Voges

Axel Kobus

Hermann Winkler

Guenter Kreilkamp

Udo Knippenberg

Wolfgang Benesch

Christoph Schwarz

Sebastian Reimann

Philip Zitzewitz

Johannes Ruwwe

Daniel Dembkowski

Katharina Minke

Hans Henniges

André Feldmann

Kerstin Bodmann

Michael Horn

Philip Heinrich Reinsberg

Jeffrey Howard Dimmit

Andreas Harthun

Muhammad Irfan

Roland Fischer

Thomas Riethmann

Bettina Ludwig

Jens Reich

Peter Watkins

Alexander Schraven

Felix Gärtner

Thomas Kuebelbaeck

Wolfgang Schumann

Jochen Niemeyer

Stefanie Weyler

Guylann Collet

Lutz-F Tietze

Beatrix Vom Bruch

Bernd Helpap

Jorn Rolker

Elke Fiebig-Bauer

Franz Rudolf Bauer

Julia Rieb

Johanna Elisabeth Bauer

Franz-Albert Von Itter

Kai-Martin Krüger

Sabine Schering

Thomas Kübelbäck

Hans-Juergen Pitz

Jutta Malter

Karl-Heinz Bruehl

Mirko Michel

Bettina Bressel

Lucien R Meier

Klaus Buhlmann

Julia C Andersen

Gudrun Schwub-Gwinner

Arne J Schultchen

Marcel Van Rijssel

Stephanie I Tiling

Kai-Martin Krueger

Michael Thiel

Chris Jones

Dirk Röttger

A process can be used for preparing sodium and potassium alkoxides. The process is characterized by two simultaneously implemented but spatially separated reactions of an alcohol ROH with NaOH, and ROH with KOH, to give sodium alkoxide and potassium alkoxide, respectively. The vapours formed in this case contain the alcohol used and water. The vapours are combined, and the resulting mixed vapour is fed to a common distillation with recovery of the alcohol.

Method for the simultaneous production of sodium and potassium alcoholates

A method can be used for producing alkali metal alcoholates in counter flow by reactive rectification. The alkali metal is selected from sodium and potassium. In a first part of the method, the alcohol is converted in counter flow with the respective alkali metal hydroxide. In a second part of the method, the mixture of alcohol and water obtained is separated in a rectification column, and the alcoholic vapour arising is condensed, as a result of which the temperature thereof increases. The energy dissipated during cooling of the condensed vapour is then used in the first part of the method. This permits an energy-efficient production of the alkali metal alcoholates concerned.

Method for the energy-efficient production of sodium and potassium alcoholates

An improved method is used for preparing triacetone amine while recycling the by-products. This involves treating the crude product from triacetone amine preparation, which leads to an increase in the content of compounds which react readily with ammonia. This method enables efficient recycling of the by-products formed in the synthesis of triacetone amine.

Method for preparing triacetone amine

An N-methyl-substituted triacetonamine compound can be produced by reacting at least one triacetonamine compound with formaldehyde under reductive conditions.

Process for preparing an N-methyl-substituted triacetonamine compound

An N-substituted triacetonediamine compound is prepared by reacting 4-amino-2,2,6,6-tetramethylpiperidine or a derivative thereof with a carbonyl compound in a reductive amination, wherein reductive conditions are established by conducting the reaction in the presence of hydrogen and in the presence of a supported catalyst, wherein the supported catalyst includes at least one metal M, wherein the metal M is selected from the group consisting of V, Cr, Mo, Mn, Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, and Cu.

Synthesis of triacetonediamine compounds by reductive amination proceeding from triacetonediamine and derivatives thereof

A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I),  Compositions (AB) comprising (A) and (B) are also provided.

Process and composition for inhibiting the polymerization of cyclopentadiene compounds

A process for inhibiting the polymerization of cyclopentadiene compounds (B) by contacting the cyclopentadiene compound with a quinone methide compound (A) of structure (I), Compositions (AB) comprising (A) and (B) are also provided.

In a method of absorbing COfrom a gas mixture the use of an absorption medium comprising water and at least one amine of formula (I) 

[object Object]

An N-methyl-substituted triacetonamine compound is prepared by reacting at least one triacetonamine compound (I) with formaldehyde under reductive conditions, in the presence of hydrogen and in the presence of a supported catalyst, wherein the supported catalyst contains at least one metal M, wherein the metal M is selected from the group consisting of V, Cr, Mo, Mn, Ni, Pd, Pt, Fe, Ru, Os, Co, Rh, Ir, and Cu.

An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.

Process for stabilizing olefinically unsaturated monomers

COis absorbed from a gas mixture by contacting the gas mixture with an absorption medium which comprises at least water as solvent and at least one amine of formula (I) where Ris an aliphatic radical, having 2 to 6 carbon atoms and at least one amino group, and Ris hydrogen, a Calkyl radical or a radical R.

Amine-containing absorption medium, process and apparatus for absorption of acidic gases from gas mixtures

The invention relates to a process for preparing substituted or unsubstituted 1,7-diolefins by hydrodimerizing non-cyclic olefins having at least two conjugated double bonds in the presence of a reducing agent and of a catalyst, wherein the catalyst used is a metal-carbene complex.

Method for producing dienes by hydrodimerization

Provided is a process for preparing a heterocycle by catalytic reaction of an aromatic dinitrile with an amino alcohol, wherein the process includes: initially charging into a reaction vessel the amino alcohol and a catalyst to produce a reaction mixture; adding the aromatic dinitrile into the reaction mixture, which is maintained at a reaction temperature, wherein no solvent other than the amino alcohol of formula (III) is added to the reaction mixture prior to and/or during the catalytic reaction; and after completion of the catalytic reaction, completely replacing, or substantially completely replacing, unreacted amino alcohol with a nonpolar solvent to obtain the heterocycle, wherein the unreacted amino alcohol is present in an amount of not more than 20 wt. %, preferably 3-10 wt. % or less, based on a total weight of the heterocycle.

Process for preparing heterocycles

A method for preparing a substituted 1,4-quinone methide from a 3,5-disubstituted 4-hydroxybenzaldehyde is provided. Also provided is a method to prepare a 3,5-disubstituted 4-hydroxybenzaldehyde from the corresponding 2,6-disubstituted phenol.

Process for preparing substituted 1,4-quinone methides

Growing community of inventors

Marl, Germany

Manfred Neumann