Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Evonik Degussa Gmbh

Huels Aktiengesellschaft

Degussa Aktiengesellschaft

Alfred Kaizik

Wilfried Bueschken

Hans-Gerd Lueken

Dietrich Maschmeyer

Klaus-Diether Wiese

Franz Nierlich

Michael Grass

Bernhard Scholz

Axel Tuchlenski

Dirk Fridag

Walter Toetsch

Dieter Hess

Dirk Roettger

Wilfried Büschken

Martin Trocha

Stefan Drees

Cornelia Borgmann

Markus Winterberg

Wilhelm Droste

Markus Priske

Goetz Baumgarten

Guido Protzmann

Robert Franke

Matthias Beller

Ralf Jackstell

Armin Matthias Rix

Thomas Quandt

Kurt-Alfred Gaudschun

Wilfried B&uuml;schken

Frank Brocksien

Dietmar Gubisch

Joachim Schuler

Michael Graβ

Burkhard Reeken

Hermann-Josef Schulte-Althoff

Hans-Gerd Lüken

Patrick Muhlack

Walter Tötsch

Andreas Beckmann

Bart Hamers

Marc Becker

Dieter Reusch

Uwe Ernst

Udo Lenz

Holger Klein

Udo Knippenberg

Silvia Santiago Fernandez

Rudolf Nehring

Dirk Röttger

Oliver Moeller

Cord Knoop

Frank Hoeper

Rainer Malzkorn

Joerg Krissmann

Klaus Armbrust

Dirk Mackowiak

Norbert Scholz

Frank Höper

Kerstin Kaemper

Andreas Stenert

Götz Baumgarten

Detlef Arnoldi

Walter T&ouml;tsch

Walter T&ouml;etsch

Dirk R&ouml;ettger

Felix Gosmann

Michael Graß

Silvia Santiago-Fernandez

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 enriching a homogenous catalyst from a process flow comprising said homogenous catalyst as a component, wherein the process flow is conducted over at least one membrane and wherein the membrane wholly or partially comprises a polymer that has planar polymer units connected to one another via a rigid link and wherein the linker is contorted, such that at least one planar polymer unit is connected to at least one second planar polymer unit via the link, in a non-co-planar arrangement. The invention furthermore relates to a method for producing tridecanal.

Method for enriching a homogeneous catalyst from a process flow

The invention relates to a process for preparing a mixture of isomeric decane-carboxylic acids, which comprises the following steps:

Process for preparing decanecarboxylic acids

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 invention relates to a method for separating and partially returning transition metals and/or catalytically effective complex compounds thereof from a reaction mixture by combining one at least one-stage membrane separation and an adsorption, wherein a current comprising a catalyst, comprising a transition metal, is divided over at least one one-stage membrane separation step in a transition metal enriched retentate stream that resupplies the reaction mixture and a transition metal depleted permeate stream and the transition metal depleted permeate stream is further supplied to an adsorption step. The invention further relates to a method for producing tridecanals.

Method for separation and partial return of rhodium and catalytically effective complex compounds thereof from process streams

The invention relates to the preparation of alicyclic carboxylic acids or their derivatives by selective hydrogenation of the corresponding aromatic carboxylic acid (derivatives) in at least two series-connected reactors, at least one reactor being operated in loop operating mode. The catalyst volumes in the method are set in such a manner that the catalyst volume required, based on the conversion rate, is as low as possible.

Method for continuous catalytic hydrogenation

The invention relates to a method for continuously producing &#x3b1;,&#x3b2;-unsaturated C-aldehydes from aliphatic C-aldehydes, comprising the following steps: aldol-condensing aliphatic C-aldehydes into &#x3b1;,&#x3b2;-unsaturated C-aldehydes in the presence of an aqueous base in a tube reactor; phase separating the output of the tube reactor into an aqueous catalyst phase and an organic product phase; separating the organic product phase into &#x3b1;,&#x3b2;-unsaturated C-aldehydes, aliphatic C-aldehydes, and auxiliary products; discharging a part of the aqueous catalyst phase to remove the reaction water and supplementing said part with liquor solution and subsequently returning said part to the tube reactor. The task of the invention is to improve a method of said kind in a way such that it requires lower energy input. This is achieved in that the aliphatic C-aldehydes and/or the &#x3b1;,&#x3b2;-unsaturated C-aldehydes are dispersed in the aqueous base as drops, wherein the average Sauter diameter of the drops is between 0.2 mm and 2 mm.

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The invention relates to a method for producing &#x3b1;,&#x3b2;-unsaturated aldehydes, wherein a catalytic aldol condensation of charged aldehydes is carried out in the presence of an aqueous base within a continuous-flow reactor. The aim of the invention is to provide a method for aldolizing aldehydes that can be carried out in a particularly economical manner. The aim is achieved by using a reaction mixing pump as the reactor.

Producing &#x3b1;,&#x3b2;-unsaturated aldehydes by means of a reaction mixing pump

A process for preparing a Caldehyde mixture from a hydrocarbon mixture comprising at least one linear butene by terminal hydroformylation under isomerizing conditions, using a catalyst system comprising rhodium, a bisphosphite ligand, and an amine.

The present invention relates to a method for producing at least one decanol by means of hydrogenating at least one decenal, wherein a first hydrogenation is carried out in the liquid phase on a solid first catalyst, wherein the first catalyst contains copper and nickel. The aim of the invention is to provide a method of the type mentioned above, according to which decenals can be hydrogenated into decanols in high yields even after long operating periods. The content of non-reacted decenals in the hydrogenation discharge in particular should be less than 1500 ppm. Said aim is achieved by carrying out the hydrogenation in two steps, which is to say in a first step in a known manner using a catalyst comprising copper, nickel and optionally chromium and/or barium oxide, and subsequently in a second step using a different catalyst that must be free of copper, chromium and nickel.

Method for producing decanols by means of hydrogenating decenals

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

The present invention relates to a mixture comprising diesters of the formula (I) where Rto R&#x2550;H or alkyl group having from 1 to 6 carbon atoms, where the Rto Rradicals may be the same or different, which is characterized in that at least two different diesters I are present in the mixture, said diesters differing in the structure of at least one of the carboxylic acid radicals CHCOO present, to a process for preparing diesters of an isosorbide derivative of the formula I, in which a hexahydric alcohol and/or a monoanhydro or dianhydro derivative of the alcohol is esterified with a mixture of at least two different carboxylic acids of the empirical formula CHCOOH, and to the use of these mixtures in paints, inks or coatings, in plastisols, adhesives or adhesive components, in sealants, as plasticizers in polymers or polymer components, as solvents, as lubricant oil components and as assistants in metal processing, and also PVC compositions or plastisols comprising PVC and from 5 to 250 parts by mass of the mixture per 100 parts by mass of PVC.

The invention relates to the hydrogenation of aromatic compounds, in particular the preparation of alicyclic polycarboxylic acids or their esters by core hydrogenation of the corresponding aromatic polycarboxylic acids or their esters, and also to catalysts suitable therefore.

Microporous catalyst and method for hydrogenating aromatic compounds

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

The invention relates to a one-stage continuous process for hydroformylating olefins having at least 5 carbon atoms to the corresponding aldehydes and/or alcohols having at least 6 carbon atoms in the presence of unmodified cobalt catalysts in a process in which, in the presence of an aqueous phase and of an organic phase, catalyst formation, catalyst extraction and hydroformylation proceed in the same reactor, which is characterized in that more aqueous cobalt salt solution is fed into the reactor as an aqueous phase with the liquid reaction mixture and is discharged from the reactor with the gas phase, and in that the level of the aqueous bottom phase is kept constant by continuously conducting a portion of the aqueous bottom phase out of the reactor.

One-stage continuous process for hydroformylating higher olefins or olefin mixtures

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Marl, Germany

Alfred Kaizik