Evonik Oxeno Gmbh & Co. Kg

Evonik Operations Gmbh

Evonik Degussa Gmbh

Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Evonik Functional Solutions Gmbh

Evonik Industries Ag

Armin Matthias Rix

Stephan Peitz

Niklas Paul

Moritz Schröder

Dirk Roettger

Markus Winterberg

Guido Stochniol

Tanita Valèrie Six

Philip Lutze

Wilfried Bueschken

Jochen Praefke

Reiner Bukohl

Franz Nierlich

Frank Geilen

Dietrich Maschmeyer

Manfred Neumann

Gerda Grund

Udo Peters

Christian Boeing

Robert Franke

Dirk Fridag

Alfred Kaizik

Michael Grass

Martina Ortelt

James Elder

Franz-Felix Kuppinger

Matthias Groemping

Axel Hengstermann

Ralf Meier

Jürgen Mosler

Thomas Quandt

Helene Reeker

Alexander Brächer

Holger Wiederhold

Wilfried Büschken

Andreas Beckmann

Ana Markovic

Christian Lettmann

Marc Becker

Jörg-Joachim Nitz

Sebastian Reimann

Benedikt Dercks

Philip Zitzewitz

Andreas Wolff

Frank Hoeper

Tatina Valèrie Six

Robert Jansen

Matthias Orschel

Joerg-Joachim Nitz

Stefan Drees

Guido Streukens

Peter Kreis

Udo Knippenberg

Silvia Santiago Fernandez

Markus Schwarz

Jörg Schallenberg

Dirk Röttger

Walter Luh

Cord Knoop

Martin Maier

Joerg Schallenberg

Stefan Röder

Martin Oldemeyer

Matthias Böse

Juergen Lippe

Gunnar Schilling

Markus Galle

Joerg Leistner

Raphael Schriewer

Arnd Bruhns

Silvia Santiago-Fernandez

Ralf Duessel

Frank Höper

Benedikt Dereks

Ralf Boll

Martin Althoff

Mathias Vogt

Andreas Oldenkott

Franz-Josef Stock

Marius Tiesbohnenkamp

Christian Böing

Helena Lopez-Fernandez

Matthias Leipold

Tanita Valérie Six

Michael D Hinton

Rolf Hirsch

Norbert Richter

Christian Psiorz

Martin Wüller

Johannes Ruwwe

Jorg Schallenberg

James Edward Elder

Dirk RÖTTGER

Matthias Grömping

Jörg Leistner

A process for removing butenes from C4-hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent. The process also involves heat integration, which allows utilization of the heat of the solvent for heating and/or at least partly evaporating various streams.

Process for removing butenes from C4-hydrocarbon streams and two-stage evaporation

A process can be used for purifying a hydrocarbon stream containing at least Cx alkanes, Cx olefins, low boilers such as Cx−1 hydrocarbons, and high boilers such as Cx+1 hydrocarbons, with x=3 or 4. The process involves separating off low boilers and separating off high boilers, wherein the separating-off of high boilers is performed in the presence of hydrogen and hence a hydrogenation of the olefins present takes place.

Process for removing extraneous odour-forming substances from hydrocarbon streams

Energy-efficient process for removing butenes from C4-hydrocarbon streams

A process produces sodium and/or potassium alkoxides in countercurrent by reactive rectification. Alcohol is reacted in countercurrent with the respective alkali metal hydroxide. The vapours containing alcohol and water are separated in at least two serially arranged rectification columns. The energy of the vapour obtained in the second rectification is utilized for operating the first rectification. This specific energy integration coupled with establishing a certain pressure difference in the two rectification stages makes it possible to cover a particularly large proportion of the energy required for the rectification through heating steam and minimizes the use of electricity.

Process for the energy-efficient production of alkali metal alkoxides

A method for separating butenes from C4 hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent, and a subsequent adiabatic oligomerisation. The method also involves heat integration, which makes it possible to use the heat of the solvent in order to heat and/or at least partly evaporate various streams.

Method for separating butenes from C4 hydrocarbon streams, with subsequent oligomerisation

A method for separating butenes from C4 hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent. The method also involves heat integration, which makes it possible to use the heat of the solvent in order to heat various streams.

Method for preventing three-phase separation of butenes from C4 hydrocarbon streams

The present invention provides a two-stage process for removing polyunsaturated hydrocarbons from C4 hydrocarbon streams that, in addition to C4 hydrocarbons, also contain C5 hydrocarbons and mercaptans and/or disulfides.

Process for removing polyunsaturated hydrocarbons from C4 hydrocarbon streams in the presence of mercaptans, disulfides and C5 hydrocarbons

Energy-efficient process for removing butenes from C4-hydrocarbon streams and subsequent n/iso separation

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.

Process for preparing aldehydes and cooling a stream of matter

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 process produces sodium and/or potassium alkoxides in countercurrent by reactive rectification. Alcohol is reacted in countercurrent with the respective alkali metal hydroxide. The vapours containing alcohol and water are separated into at least two serially arranged rectification columns. The energy of the vapour obtained in the first rectification is utilized for operating the second rectification. This specific energy integration coupled with establishing a certain pressure difference in the two rectification stages makes it possible to cover a particularly large proportion of the energy required for the rectification through electricity and to save heating steam.

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 extractive distillation column system contains a combination column and a side rectification column. A process can be used for separation of butenes from C4-hydrocarbon streams using the extractive distillation column system.

Extractive distillation column system and the use thereof in the separation of butenes from C4-hydrocarbon streams

The present invention relates to a process for oligomerization of C2- to C8-olefins in at least two reaction stages, wherein in the last distillation column the reaction mixture is fractionated such that only very small amounts of the reactant olefins and the analogous alkanes remain in the bottom of the distillation column.

Process for oligomerization of olefins with optimized distillation

The present invention relates to a process for oligomerization of C2- to C8-olefins in at least two reaction stages, wherein in the last distillation column the reaction mixture is fractionated such that only very small amounts of the oligomers formed remain in the distillate.

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Marl, Germany

Armin Matthias Rix