Evonik Degussa Gmbh

Evonik Oxeno Gmbh

Evonik Stockhausen Gmbh

Evonik Operations Gmbh

Evonik Industries Ag

Evonik Oxeno Gmbh & Co. Kg

Markus Winterberg

Dietrich Maschmeyer

Armin Matthias Rix

Guido Stochniol

Dirk Roettger

Reiner Bukohl

Christian Boeing

Stephan Peitz

Horst-Werner Zanthoff

Alfred Kaizik

Wilfried Bueschken

Franz Nierlich

Wilfried Büschken

Stephan Houbrechts

Silvia Santiago Fernandez

Dirk Fridag

Frank Geilen

Franz-Felix Kuppinger

Hans-Gerd Lueken

Jürgen Mosler

Franck Furno

Günther Bub

Holger Wiederhold

Andreas Sabbagh

Udo Knippenberg

Robert Franke

Dieter Hess

Michael Grass

Peter Wasserscheid

Hinnerk Gordon Becker

Thomas Quandt

Helene Reeker

Markus Priske

Andreas Beckmann

Bart Hamers

Goetz Baumgarten

Marc Becker

Burkard Kreidler

Stefan Buchholz

Jochen Praefke

Jörg Schallenberg

Dirk Röttger

Walter Luh

Jörg Sauer

Joerg Schallenberg

Andreas Wolff

Thorsten Schwärtzke

Günter Latoschinski

Gunnar Schilling

Christian Schulze Isfort

Jörg Leistner

Berthold Melcher

Michael Graβ

Ted M Pettijohn

Hans-Gerd Lüken

Marco Haumann

Andreas Gevers

Georg Skillas

Silvia Santiago-Fernandez

Asli Nau

Wolfgang Garstka

Tobias Laiblin

Mathias Vogt

Stephen Bowers

Shahbaz Naeem

Matthias Leipold

Oliver Markus Busch

Christian Böing

Rainer Bukohl

Dirk RÖTTGER

Dr Jörg Leistner

Judith Scholz

Jorg Schallenberg

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

A method includes at least two-stage process for the oligomerization of short-chain olefins in the presence of a catalyst, wherein the regeneration of the catalyst is stage-customized.

Process for oligomerization with stage-customized exchange of the oligomerization catalyst

The invention relates to a method for cleaning hydrocarbon mixtures, in which a contaminated hydrocarbon mixture comprising hydrocarbons having three to eight carbon atoms is at least partly freed of impurities by contacting with a solid sorbent, wherein the hydrocarbon mixture is exclusively in the liquid state during contact with the sorbent. The object of the invention is to specify a process for cleaning liquid Cto Chydrocarbon mixtures, which is based on a readily available but non-carcinogenic sorbent and which achieves better purities compared to traditional molecular sieves. This object is achieved by using, as sorbents, solid materials of the following composition: Materials of this kind are otherwise used as catalysts in methanol synthesis.

Cleaning of liquid hydrocarbon streams by means of copper-containing sorbents

The invention relates to a method for producing linear butenes from methanol. The problem addressed is that of specifying such a method in which the methanol used is converted, to the largest possible extent, into butenes. The problem is solved by combining a methanol-to-propylene process with a metathesis reaction by means of which the propene obtained from the methanol is converted into linear butenes.

Process for preparing linear butenes from methanol

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 invention relates to a method for producing a product mixture () by means of the technical hydroformylation of a hydrocarbon stream () that contains isobutene, and for separating the product mixture () that is obtained, as well as to a device for the claimed method and to the use of a claimed device. The problem addressed thereby is that of providing a method and an associated device that allow the amount of high-boiling substances in the product mixture () to be kept as low as possible and thus the yield of the reaction to be increased. The problem is solved by the use of a nano-filtration device (M) for separating the catalyst from the product mixture (), said device having especially high permeability to 3-methylbutanoic acid.

Method and device for the hydroformylation of isobutene and for the separation of the product mixture

The invention relates to a method for the thioetherification of mercaptanes with polyunsaturated hydrocarbons, carried out in a reactor with the addition of hydrogen, using a heterogenic catalyst and in the presence of 1-butene. The aim of the invention is to develop such a method to the extent that the creation of value from the Craw material stream is increased. Said aim is achieved in that the hydrogen is added to the reaction in such a manner that the molar ratio of hydrogen to polyunsaturated hydrocarbons is no more than one.

Thioetherification of mercaptanes in C4 hydrocarbon mixtures

The invention provides a catalyst system composed of: Additionally provided is the use of the catalyst systems of the invention in the oligomerization of unsaturated hydrocarbon mixtures.

Process for oligomerizing olefins

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 describes a process for the parallel selective hydrogenation of branched and unbranched multiply unsaturated C-C-hydrocarbons in olefin-containing hydrocarbon mixtures with minimization of hydrogenation and isomerization of the olefins present in the stream.

Process for the selective hydrogenation of multiply unsaturated hydrocarbons in olefin-containing hydrocarbon mixtures

The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120&#xb0; C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation.

Method for producing low-odor n-butane

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

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 is a method for processing a mixture containing water, 3-methyl-1-butane and at least one other methylbutene. The method comprises primary distillation of the mixture, giving a gaseous primary overhead product containing methylbutene and water and a water-free primary bottom product containing 3-methyl-1-butene; condensation of the gaseous primary overhead product so as to give a condensate comprising a liquid aqueous phase and a liquid organic phase; separation of the condensate into a liquid aqueous phase and a liquid organic phase; discharge of the liquid aqueous phase; recirculation of the organic phase to the primary distillation; and finally secondary distillation of the water-free primary bottom product from the primary distillation so as to give a secondary overhead product comprising 3-methyl-1-butene and a secondary bottom product. The secondary overhead product obtained has a purity which enables it to be used directly as monomer or comonomer for preparing polymers or copolymers.

Work-up of a 3-methyl-1-butene-containing mixture

Growing community of inventors

Datteln, Germany

Markus Winterberg