Oxeno Olefinchemie Gmbh

Evonik Operations Gmbh

Oxeno Olefinshemie Gmbh

Evonik Degussa Gmbh

Evonik Oxeno Gmbh

Andreas Beckmann

Dieter Reusch

Franz Nierlich

Wilfried Bueschken

Udo Peters

Dietrich Maschmeyer

Wilfried Büschken

Lothar Kerker

Guido Stochniol

Alfred Kaizik

Stephan Peitz

Armin Matthias Rix

Dirk Roettger

Markus Winterberg

Gerda Grund

Franz-Felix Kuppinger

Helene Reeker

Bernhard Scholz

Axel Tuchlenski

Udo Knippenberg

Silvia Santiago Fernandez

Jochen Praefke

Dirk Röttger

Ralf Duessel

Wilfried Buschken

Silvia Santiago-Fernandez

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 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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The invention relates to a process by which C- to C-olefins or an essentially sulfur-free olefin cut comprising C- to C-olefins is isomerized over a catalyst comprising an element of the eighth transition group of the Periodic Table, in the presence of at least one added sulfur compound, and any polyunsaturated hydrocarbons contained therein are selectively hydrogenated and hydroisomerized, and also the sulfur compounds are separated from the product and optionally recycled, so that virtually sulfur-free products are obtained.

Hydroisomerization of olefins comprising between 4 and 6 carbon atoms

Isobutene is prepared by dissociating tert-butanol into isobutene and water over an acid ion-exchange resin arranged as a fixed bed in at least one reactor at a temperature of from 80 to 150&#xb0; C. and at a pressure of from 5 to 25 bar to obtain a reaction mixture, separating the reaction mixture into isobutene, a by-product, water and at least one mixture of undissociated tert-butanol and water. The reactor is operated pseudo-isothermally, with a temperature difference between inflowing and outflowing streams of less than 15 K.

Process for preparing isobutene from tert-butanol

The invention relates to a process for preparing tert-butanol by reaction of a homogeneous mixture comprising water, tert-butanol and an isobutene-containing hydrocarbon mixture over an acidic ion-exchange resin at from 30 to 120&#xb0; C., wherein the homogeneous mixture contains, at a proportion by mass of isobutene of above 10%, from 30 to 80% of the maximum amount of water made possible by the solubility of water in the mixture of tert-butanol and the isobutene-containing hydrocarbon mixture.

Process for preparing tert-butanol

Isobutene in isobutenic hydrocarbon mixtures is oligomerized over a solid acidic ion exchange resin, said acidic ion exchange resin containing, for example, sulfonic acid groups, some of whose protons have been exchanged for metal ions.

Oligomerization of isobutene in N-butenic hydrocarbon streams

The present invention relates to a process for separating 2-butanol from tert-butanol/water mixtures using a membrane to reduce a water concentration to less than the limit concentration of the distillation boundary line connecting the two azeotropes TBA/water and SBA/water and is subsequently worked up by distillation.

Process for separating 2-butanol from tert-butanol/water mixtures

The present invention relates to a process for separating 2-butanol from tert-butanol/water by adding of tert-butanol such that the water concentration lowers to less than the limit concentration of the distillation boundary line connecting the two azeotropes TBA/water and SBA/water and is subsequently worked up by distillation.

The invention relates to a process for separating 2-butanol from an industrial mixture which includes 2-butanol, tert-butanol and water by separating water from the industrial mixture by distillation to obtain a distillate, wherein the distillate has, in terms of the 2-butanol, tert-butanol and water in the industrial mixture, a proportion by mass of water, which at a pressure, is greater than the limit concentration of the distillation boundary line connecting an azeotrope of tert-butanol and water; and an azeotrope of 2-butanol and water; subsequently changing the pressure so that the mixture has, in terms of the 2-butanol, tert-butanol and water in the distillate, a proportion by mass of water which is less than the limit concentration of the distillation boundary line connecting the distillation boundary line connecting an azeotrope of tert-butanol and water; and an azeotrope of 2-butanol and water; and subsequently distilling the mixture at the same pressure into a stream comprising 2-butanol and a stream comprising tert-butanol and water.

Process for removing 2-butanol from tert-butanol/water mixtures

The invention relates to a process for preparing tert-butanol (TBA) from isobutene-containing mixtures, in which at least part of the conversion is achieved with the aid of a reactive rectification.

Method for producing tert-butanol by means of reactive rectification

The invention relates to a process for preparing tert-butanol (TBA) by reacting isobutene-containing hydrocarbon mixtures with water over acidic solid catalysts in a plurality of reactors, wherein the conversion is increased upstream of the last reactor by removing a portion of the TBA present in the reaction mixture.

Obtaining tert-butanol

The invention relates to a process for preparing high-purity diisobutene by reaction of isobutene or isobutene-containing hydrocarbon mixtures over a solid acidic ion-exchange resin containing sulfonic acid groups whose protons have been partly replaced by metal ions and to the use of the diisobutene.

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Recklinghausen, Germany

Andreas Beckmann