Huels Aktiengesellschaft

Oxeno Olefinchemie Gmbh

Chemische Werke Huls Aktiengesellschaft

Evonik Oxeno Gmbh

Wilhelm Droste

Franz Nierlich

Walter Toetsch

Fritz Obenaus

Paul Olbrich

Richard Mueller

Alfred Kaizik

Bernhard Scholz

Joachim Neumeister

Wilfried Bueschken

Hans-Gerd Lueken

Thomas Wildt

Klaus-Diether Wiese

Wolfgang H Muller

Wilfried Büschken

Uwe Tanger

Udo Peters

Stefan Drees

Bernd Nowitzki

Gerhard Thelen

Jochen Praefke

Dietmar Gubisch

Joachim Schuler

Dirk Röttger

Lothar Fischer

Michael Zolffel

Hans-Gerd Lüken

Rainer Malzkorn

Walter Tötsch

Hans-Gerd L Uken

Wolf Streubel

Richard Filipiak

Gernard Ludwig

Harald Bartels

Herbert Deppe

The invention relates to a process for preparing methyl tert-butyl ether (MTBE) in qualities which are suitable for organic syntheses and for use as a specialty solvent from MTBE in fuel quality.

Preparation of highly pure methyl tert-butyl ether

A process for the catalytic hydroformylation of olefins having from 6 to 24 carbon atoms, in which the hydroformylation is carried out in one or more stage(s) and a mixture comprising at least one olefin and an aldehyde in a molar ratio of aldehyde to olefin of from 0.005:1 to 0.2:1 is used as feed in at least one of these stages which is carried out in the presence of an unmodified cobalt complex as catalyst.

Process for the hydroformylation of olefins

The present invention relates to a process for preparing a C-alcohol mixture which is suitable, in particular, as precursor for the preparation of compounds having surfactant properties and of plasticizers.

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The invention relates to a process for the selective hydrogenation of reaction mixtures from the hydroformylation of C,to C,olefins using hydrogen and a supported catalyst which, as active components, comprises copper, nickel and chromium.

Process for the selective hydrogenation of hydroformylation mixtures

A highly flexible process for preparing butene oligomers from field butanes. The process can be controlled to produce the desired oligomerization products by appropriate selection of the starting materials.

Process for preparing butene oligomers from field butanes

A process is described in which butene oligomers are prepared from Fischer-Tropsch olefins, in which the butenes present in a C.sub.4 fraction of Fischer-Tropsch hydrocarbons are oligomerized to obtain dibutene. The dibutene can be fractionated in a fine distillation stage into di-n-butene and di-isobutene. In one embodiment of the process, the ethylene present in the Fischer-Tropsch olefins is dimerized and the dimerization mixture is recycled to the C.sub.4 fraction. In another embodiment, the isobutene present in the C.sub.4 fraction is reacted with an alcohol to give an alkyl tert-butyl ether, and only the remaining n-butene is oligomerized so that di-n-butene is formed as the sole dibutene.

Process for preparing butene oligomers from Fischer-Tropsch olefins

A process for the coupled production of alkyl tert-butyl ethers and butene oligomers from a mixture containing isobutane and n-butane. The isobutane is converted to the alkyl tert-butyl ether and the n-butane is converted to the oligomers. The ratio of the two reaction products may be controlled by setting the ratio of n-butane to isobutane appropriately by isomerization.

Process for preparing alkyl tert-butyl ethers and di-n-butene from field

The invention relates to a process for preparing di-n-butene and alkyl tertbutyl ethers in a coupled production from field butanes, which indicates (a) separating the field butanes 1 into n-butane and isobutane in the separation stage 4, (b) dehydrogenating the n-butane 5 in a dehydrogenation stage 6 to give an n-butene-containing dehydrogenation mixture 7, oligomerizing the n-butene in the oligomerization stage 10 to give an oligomer mixture 11 and separating di-n-butene 12 off from this, and (c) de-hydrogenating the isobutane 15 in the dehydrogenation stage 16 to give an isobutene-containing dehydrogenation mixture 17 and reacting the isobutene with an alkanol 20 in the etherification stage 19 to give an alkyl tert-butyl ether 21. In an advantageous embodiment, the field butanes 1, prior to entry into the separation stage 4, are subjected to hydrogenation conditions in the hydrogenation stage 2 and an isomerization stage 3 is assigned to the separation stage 4, by means of which isomerization stage the ratio of n-butane to isobutane is set in accordance with the desired ratio of alkyl tertbutyl ether to di-n-butene.

The present invention relates to a catalyst for the selective hydrogenation of an unsaturated compound, based on a noble metal and/or a noble-metal oxide on an aluminum oxide support, and to a process for the preparation of the catalyst. The present invention further relates to a process for the selective hydrogenation of unsaturated compounds.

Catalyst, process for the preparation thereof and process for the

Olefins are oligomerized by passing a hydrocarbon feedstock mixture containing olefins of from 2 to 8 carbon atoms over a molecular sieve having a pore diameter of from greater than 4 angstroms to 15 angstroms, and then oligomerizing said olefins by passing the hydrocarbon feedstock over a nickel-containing catalyst at a temperature of from 0.degree.to 200.degree. C. and at a pressure of from 1 to 70 bar absolute.

Oligomerization of olefins

A hydrocarbon containing sulfides, disulfides, trisulfides, tetrasulfides or mixtures can be desulfurized by contacting the hydrocarbon with a zeolite containing copper, silver, zinc or mixtures thereof.

Process for low level desulfurization of hydrocarbons

A process for preparing 2-ethylhexanol by the liquid-phase catalytic hydrogenation of 2-ethylhexenal and a catalyst for preforming this catalytic hydrogenation are disclosed.

Process for the preparation of 2-ethylhexanol by liquid-phase catalytic

Vinyl chloride is prepared by reacting acetylene with hydrogen chloride in the presence of a palladium compound catalyst in a solvent of an aliphatic and/or cycloaliphatic carboxylic acid amide at temperatures higher than room temperature.

Process for the manufacture of vinyl chloride by reaction of acetylene

A process for the simultaneous manufacture of pure methyl tertiary butyl ether (MTBE) and a substantially isotubene-free mixture of C.sub.4 -hydrocarbons, by reacting the isobutene contained in the mixture of C.sub.4 -hydrocarbons with excess methanol in the liquid phase at elevated temperatures on strongly acid, macroporous, organic ion exchange resins. The process has the following steps:

Process for the simultaneous manufacture of pure MTBE and a

Process for the preparation of pure methyl tert.-butyl ether. Isobutene or isobutene-containing hydrocarbon mixtures are reacted with methanol in a molar ratio of 1:1 to 1:2 in the liquid phase at temperatures of between 30.degree. and 100.degree. C. on sulfonated, strongly acidic, macroporous organic ion exchange resins. After separation of the unreacted hydrocarbons, the reaction mixture is distilled under pressure; the methanol-containing distillate formed during the distillation is recycled into the zone of the reaction between methanol and isobutene; and pure methyl tert.-butyl ether is withdrawn from the sump of the distillation column.

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Marl, Germany

Wilhelm Droste