Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Huels Aktiengesellschaft

Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Evonix Oxeno Gmbh

Evonik Degussa Gmbh

Franz Nierlich

Guido Stochniol

Dietrich Maschmeyer

Alfred Kaizik

Dirk Roettger

Stephan Houbrechts

Wilfried Bueschken

Wilhelm Droste

Bernhard Scholz

Silvia Santiago Fernandez

Wilfried Büschken

Andreas Beckmann

Walter Toetsch

Udo Peters

Cornelia Borgmann

Horst-Werner Zanthoff

Klaus-Diether Wiese

Axel Tuchlenski

Dagmara Ortmann

Paul Olbrich

Richard Mueller

Michael Grass

Armin Matthias Rix

Markus Winterberg

Dieter Reusch

Fritz Obenaus

Jochen Praefke

Walter Luh

Rainer Malzkorn

Joachim Neumeister

Dieter Hess

Walter Kaminsky

Thomas Quandt

Reiner Bukohl

Udo Knippenberg

Hans-Josef Ratajczak

Gerhard Franz

Kurt-Alfred Gaudschun

Dirk Röttger

Lothar Kerker

Thomas Wildt

Georg Skillas

Joerg Krissmann

Stefanie Derlin

Matthias Groemping

Wilhelm Keim

Martin Trocha

Peter Wasserscheid

Guido Protzmann

Bernd Nowitzki

Alfred Oberholz

Frank Steding

Michael Graβ

Frank Hoeper

Richard Filipiak

Kerstin Kaemper

Frank Höper

John Kashnitz

Ralf Duessel

Otto Reitemeyer

Joerg Leistner

Matthias Grömping

Peter Kaßler

Silvia Santiago-Fernandez

The present invention relates to a process for preparing a catalyst which, in a formal sense, comprises 0.1 to 20% by mass of alkali metal and/or alkaline earth metal oxide, 0.1 to 99% by mass of oxide and 0.1 to 99% by mass of silicon dioxide, which is characterized in that it aluminum comprises the steps of treating an aluminosilicate with an aqueous alkali metal and/or alkaline earth metal salt solution under acidic conditions and calcining the aluminosilicate treated with aqueous alkali metal and/or alkaline earth metal salt solution, and to a catalyst which is obtainable by this process and, in a formal sense, comprises alkali metal and/or alkaline earth metal oxide, aluminum oxide and silicon dioxide, which is characterized in that the catalyst, in a formal sense, has a content of alkali metal and/or alkaline earth metal oxides of 0.5 to 20% by mass, a content of aluminum oxide of 4 to 30% by mass and a content of silicon dioxide of 60 to 95% by mass, and to the use of this catalyst in a process for preparing isoolefins having 4 to 6 carbon atoms by catalytic gas phase cleavage of tertiary alcohols or alkyl tert-alkyl ethers.

Catalyst and process for preparing isoolefins

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

The present invention relates to a copolymer which contains 3-methylbut-1-ene as a comonomer and which contains ethene or propene as a further monomer, the proportion of the incorporated 3-methylbut-1-ene being 0.1 to 40 mol %, and to a process for preparing such copolymers, the polymerization being performed in the presence of a catalyst which comprises at least one cyclopentadienyl group.

Process for preparing polymers from 3-methylbut-1-ene

The present invention relates to the preparation of 3-methylbut-1-ene from a hydrocarbon stream I comprising isobutene by feeding a hydrocarbon stream II which comprises at least 70% by mass of isobutene in relation to the olefins present in the hydrocarbon stream and which has been obtained from hydrocarbon stream I or is identical to it to a process step for hydroformylation in which isobutene is hydroformylated in the presence of a rhodium catalyst, hydrogenating the aldehyde obtained from the hydroformylation of isobutene to the corresponding alcohol and preparing 3-methylbut-1-ene by water elimination from the alcohol.

Process for preparing 3-methylbut-1-ene

A catalyst, useful in the preparation of isoolefins and containing 0.1 to 20% by mass of an alkali metal oxide, an alkaline earth metal oxide and mixtures thereof; 0.1 to 99% by mass of aluminum oxide; and 0.1 to 99% by mass of silicon dioxide, is prepared by a) treating an aluminosilicate with an aqueous alkali metal salt solution, an alkaline earth metal salt solution and mixtures thereof, under acidic conditions, to obtain a treated aluminosilicate; and b) calcining the treated aluminosilicate, to obtain the catalyst.

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

A process for the dissociation of methyl tert-butyl ether (MTBE), which includes at least

Process for the dissociation of MTBE

The invention relates to a process for preparing 1-butene from technical mixtures which comprise at least 1-butene, isobutene, n-butane and 2-butenes by partial conversion of the isobutene present, distillative removal of a fraction comprising 1-butene and isobutene, and conversion of the isobutene present therein to tert-butyl ethers.

Process for preparing 1-butene from technical mixtures of C4 hydrocarbons

Isobutene is prepared by dissociation of MTBE in the gas phase, by a) fractional distillation of an MTBE-containing stream comprising feed MTBE (I) and a recycle stream (VIII) to give an MTBE-containing overhead stream (II) and a bottom stream (III) having a boiling point higher than MTBE, b) catalytic dissociation of the overhead stream (II) obtained in step a) to give a dissociation product (IV), c) separation by distillation of the dissociation product (IV) obtained in step b) into an overhead stream (V) comprising more than 90% by mass of isobutene and a bottom stream (VI) comprising diisobutene, MTBE and more than 50% of the methanol present in the dissociation product (IV), d) fractional distillation of the bottom stream obtained in step c) under conditions under which the methanol is obtained as bottom product (VII) and more than 99% of the MTBE is obtained in the overhead product (VIII), and e) recirculation of the overhead product (VIII) to step a).

Isobutene is prepared by a process in which a) an MTBE-containing stream I is separated by distillation into an MTBE-containing overhead stream II and a bottom stream III which comprises compounds having boiling points higher than that of MTBE; and b) the MTBE present in the overhead stream II is dissociated over a catalyst to give a dissociation product IV; wherein the stream I has a proportion of 2-methoxybutane (MSBE) of greater than 1000 ppm by mass, based on MTBE, and wherein the separation by distillation in step a) and/or the dissociation in step b) is carried out so that the dissociation product IV has a concentration of less than 1000 ppm by mass of linear butenes, based on a C-olefin fraction.

The present invention relates to mixtures of alicyclic polycarboxylic esters with high cis content, to a process for their preparation by ring-hydrogenation of the corresponding aromatic polycarboxylic esters, and also to the use of the mixtures.

Mixture of alicyclic polycarboxylic acid esters having high cis isomer content

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 preparing full esters of alicyclic polycarboxylic acids from partial esters of aromatic polycarboxylic acids by hydrogenation of the partial ester followed by esterification of this compound.

Method for the production of alicyclic polycarboxylic acid esters from partial esters of aromatic polycarboxylic acids

Process for preparing 1-octa-2,7-dienyl derivatives by reacting a 1,3-butadiene-containing hydrocarbon mixture, in particular a Cfraction from a cracker, with nucleophiles, in which acetylenically unsaturated compounds are removed from the starting hydrocarbon mixture by selective hydrogenation and a telomerization is subsequently carried out.

Method for the production of 2,7-octadienyl derivatives

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Marl, Germany

Franz Nierlich