Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Evonik Degussa Gmbh

Evonik Functional Solutions Gmbh

Evonix Oxeno Gmbh

Oxeno Olefinchemie Gmbh & Co. Kg

Dirk Roettger

Franz Nierlich

Armin Matthias Rix

Cornelia Borgmann

Matthias Beller

Ralf Jackstell

Dietrich Maschmeyer

Klaus-Diether Wiese

Markus Winterberg

Reiner Bukohl

Alfred Kaizik

Holger Klein

Dieter Hess

Manfred Neumann

Niklas Paul

Moritz Schröder

Stephan Houbrechts

Jochen Praefke

Christian Boeing

Sebastian Reimann

Philip Zitzewitz

Wilfried Bueschken

Detlef Selent

Armin Boerner

Holger Wiederhold

Udo Peters

Dagmara Ortmann

Guido Protzmann

Walter Luh

Silvia Santiago Fernandez

Joerg Krissmann

Renat Kadyrov

Matthias Groemping

Wilhelm Keim

Frank Bauer

Bernhard Scholz

Axel Tuchlenski

Andreas Beckmann

Martin Trocha

Dieter Reusch

Volker Brehme

Peter Wasserscheid

Udo Knippenberg

Detlef Heller

Frank Hoeper

Rainer Malzkorn

Hans-Joachim Drexler

Juergen Koch

Gunnar Schilling

Rainer Bukohl

Joerg Leistner

Silvia Santiago-Fernandez

Kerstin Kaemper

Elke Fiebig-Bauer

Franz Rudolf Bauer

Johanna Elisabeth Bauer

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.

Process for the energy-efficient production of alkali metal alkoxides

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

A process for preparing isobutene by dissociation of MTBE, including: a) reaction of isobutene-containing hydrocarbon mixtures, with methanol, present in one or more methanol-containing streams, over acidic ion exchangers to give a stream, containing MTBE and TBA; b) separation of a stream containing MTBE and TBA, from a stream by distillation; c) dissociation of a stream in the gas phase over a heterogeneous catalyst to give a stream containing at least isobutene, methanol, MTBE and water and possibly TBA, d) separation of a stream by distillation to give a stream containing in each case more than 50% by mass of the amounts of methanol, TBA and water present in another stream and a stream containing isobutene, e) separation of water from stream to below 1% by mass by distillation to give a stream, f) total or partial recirculation of the methanol-containing stream.

Preparation of isobutene by dissociation of MTBE

The invention relates to a process for regenerating catalysts containing mixed oxides from the group of alkali metal and/or alkaline earth metal oxides, aluminium oxide and silicon oxide, characterized in that the regeneration comprises the following features:

Process for regenerating a catalyst

The present invention relates to a process for efficient purification of MTBE-containing mixtures and for preparation of isobutene by cracking of MTBE-containing mixtures.

Method for purification of mixtures comprising MTBE as well as production of isobutene by splitting of mixtures comprising MTBE

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

A process for preparing isobutene including cleaving a mixture obtained from an MTBE-containing feedstock and/or an MTBE-containing stream, affording a stream of reaction products consisting of isobutene, methanol, MTBE and by-products, the latter consisting of

Process for preparing isobutene by cleaving MTBE-containing mixtures

The invention relates to a process for preparing ETBE from technical mixtures which comprise at least 1-butene, isobutene, n-butane and 2-butenes, by reacting the isobutene present, distillatively removing a fraction comprising 1-butene and isobutene and again reacting the isobutene present therein to give ETBE.

Process for preparing ethyl tert-butyl ether from technical mixtures of C4 hydrocarbons

Process for telomerizing noncyclic olefins having at least two conjugated double bonds with at least one nucleophile using a catalyst containing a metal of group 8, 9 or 10 of the Periodic Table of the Elements, wherein the overall telomerization process has a process step of catalyst recycling, in which hydrogen is added via a hydrogen source to the mixture present in this process step.

Method for the telomerization of non-cyclic olefins

The invention relates to a process for preparing metal complexes containing carbene ligands by reacting metal compounds with ligand precursors II and/or III and to the use of the thus obtained metal complexes as catalysts. 

Method for the production of metal complexes

The invention relates to a process for preparing 1-butenic fractions having less than 2000 ppm of isobutene in relation to 1-butene from technical mixtures of Chydrocarbons I which contain at least 1-butene and 2000 ppmw to 8% by mass of isobutene based on the 1-butene, with or without n-butane, isobutane and/or 2-butenes.

Process for fine purification of 1-butenic streams

Process for telomerizing noncyclic olefins having at least two conjugated double bonds with at least one nucleophile using a catalyst containing a metal of group 8, 9 or 10 of the Periodic Table of the Elements, wherein hydrogen is added via a hydrogen source to the process in at least one process step in the overall telomerization process.

The invention relates to a process for the telomerization of acyclic olefins having at least two conjugated double bonds (I) or mixtures in which such olefins are present with nucleophiles (II) using a metal-carbene complex as catalyst.

Method for the telomerisation of non-cyclic olefins

The invention relates to a process for preparing butene oligomers and tert-butyl ethers from Chydrocarbon streams, by converting the isobutene to butene oligomers and tert-butyl ethers and removing them from the Cstreams.

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Recklinghausen, Germany

Dirk Roettger