Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Oxeno Gmbh

Evonik Industries Ag

Evonix Oxeno Gmbh

Evonik Oxeno Gmbh & Co. Kg

Reiner Bukohl

Stephan Peitz

Guido Stochniol

Dirk Roettger

Markus Winterberg

Helene Reeker

Dietrich Maschmeyer

Armin Matthias Rix

Christian Boeing

Franz Nierlich

Cornelia Borgmann

Thomas Quandt

Niklas Paul

Dagmara Ortmann

Stephan Houbrechts

Fabian Nadolny

Andreas Wolff

Gunnar Schilling

Robert Franke

Frank Geilen

Holger Wiederhold

Burkard Kreidler

Jörg Schallenberg

Dirk Röttger

Walter Luh

Joerg Schallenberg

Stefan Röder

Benjamin William Berntsson

Christian Böing

Wolfgang Garstka

Tobias Laiblin

Matthias Leipold

Angela Heykamp

Jorg Schallenberg

Dirk RÖTTGER

A process for the oligomerization of C- to C-olefins proceeds in the presence of a catalyst, wherein the oligomerization is carried out in at least one reaction stage which includes at least one reactor and at least one distillation column. The content of oligomers in the feed stream to the at least one reaction stage after removal of the oligomers in the at least one distillation column is less than 0.4% by weight.

Process for the oligomerization of olefins with control of the oligomer content in the hydrocarbon streams to be oligomerized

Oligomerization of C- to C-olefins using a catalyst is inhibited, wherein the oligomerization is carried out in at least one reaction stage including at least one reactor and at least one distillation column, and wherein the oligomer content in the feed stream to the at least one reactor of the at least one reaction stage is at least 1% by weight.

Process for inhibiting oligomerization of C3- to C5-olefins

The invention relates to a catalyst for a process for removing mercaptans and optionally disulfides (if present) from hydrocarbon streams, in particular C4 streams, in the presence of higher dienes, in particular C5 dienes. At the same time, the invention also relates to a process for removing mercaptans and disulfides (if present) from hydrocarbon streams, in particular C4 streams, in one embodiment in the presence of 1-butene, by thioetherification of the mercaptans with polyunsaturated hydrocarbons, wherein the process is carried out in a reactor with addition of hydrogen in the presence of higher dienes, in particular Cdienes.

Catalyst and process for removing mercaptans from hydrocarbon streams

A process is useful for the oligomerization of short-chain olefins in the presence of a catalyst, wherein the catalyst is kept in a dry atmosphere prior to being used in the process.

Process for oligomerization with dry handling of a catalyst before charging to the reactor

The invention relates to an oligomerization catalyst comprising nickel oxide and silica-alumina support material and to a process for oligomerization of C- to C-olefins using the oligomerization catalyst.

Oligomerization catalyst and process for the production thereof

The invention relates to a process for purifying hydrocarbon mixtures, in which a contaminated hydrocarbon mixture comprising olefins having three to eight carbon atoms is at least partly freed of sulphur-containing contaminants by contacting it with a solid sorbent, the hydrocarbon mixture being exclusively in the liquid state during the contact with the sorbent. The problem that it addressed was that of virtually completely removing sulphur compounds present in the mixture without forming new sulphur compounds again at the same time. At the same time, 1-butene present therein was not to be lost in the purification of the mixture. Finally, the sorbent used was to have a high sorption capacity, be very substantially free of carcinogenic constituents and be readily available. This problem is solved by using a sorbent based on copper oxide, zinc oxide and aluminium oxide in a particular composition, and by conducting the purification in the presence of a small amount of hydrogen.

Hydrogen-assisted adsorption of sulphur compounds from olefin mixtures

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

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 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

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

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.

Growing community of inventors

Marl, Germany

Reiner Bukohl