Evonik Oxeno Gmbh

Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Huels Aktiengesellschaft

Oxeno Olefinchemie Gmbh

Evonik Industries Ag

Hans-Gerd Lueken

Alfred Kaizik

Wilfried Bueschken

Dirk Fridag

Robert Franke

Markus Priske

Dieter Hess

Klaus-Diether Wiese

Bart Hamers

Stefan Drees

Michael Grass

Markus Winterberg

Wilhelm Droste

Katrin Marie Dyballa

Wilfried Büschken

Goetz Baumgarten

Uwe Ernst

Udo Lenz

Markus Rudek

Patrick Muhlack

Uwe Tanger

Marc Becker

Markus Schwarz

Dietmar Gubisch

Soenke Broecker

Michael Graβ

Hermann-Josef Schulte-Althoff

Frank Brocksien

Frank Hoeper

Christoph Patalong

Gernard Ludwig

Dirk Mackowiak

Norbert Scholz

Andreas Stenert

Sönke BRÖCKER

The invention relates to a method for producing alcohols by homogeneously catalyzed hydroformylation of olefins to aldehydes and subsequent hydration of the aldehydes. The invention further relates to a system for carrying out the method. The main focus is on the separation technique for work-up of the hydroformylation mixture. The problem addressed by the invention is that specifying a work-up method for hydroformylation mixtures that utilizes the specific advantages of known separation technologies but at the same time largely avoids the specific disadvantages of said separation technologies. The most important objective is to create a catalyst separation system that is as complete and at the same time conservative as possible and that operates in a technically reliable manner and entails low investment and operating costs. The method should be unrestrictedly suitable for processing the reaction output from oxo systems in 'world scale' format. The problem is solved by combining membrane separation units and a thermal separation unit, the thermal separation unit being operated in such a manner that 80% to 98% of the mass introduced with the product stream into the thermal separation unit exits the thermal separation unit again as a head product.

Optimized separation technique for work-up of homogeneously catalysed hydroformylation mixtures

The present invention relates to a method and a device for controlling the viscosity of reaction solutions in the hydroformylation of olefin-containing mixtures.

Control of the viscosity of reaction solutions in hydroformylation processes

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 process for preparing aldehydes having five carbon atoms, in which an input mixture containing 10% by weight to 50% by weight of linear butenes and less than 5% by weight of 1-butene is hydroformylated with synthesis gas in the presence of a catalyst system comprising rhodium and at least one bisphosphite ligand, wherein the hydroformylation is effected in a reactor from which, over an operating period, a cycle gas containing at least a portion of the products and unconverted reactants from the hydroformylation is continuously drawn off and partly condensed, and uncondensed components of the cycle gas are recycled into the reactor, and wherein, after the operating period has expired, the hydroformylation is stopped, the reactor is freed of reaction residues and the hydroformylation is restarted. It is based on the problem of making such a process more economically viable. The problem is solved by using a bisphosphite of the formula (1) and/or (2) as ligand, extending the operating period to more than 8000 h, and not separating solid reaction residues out of the reactor during the course of the operating period.

Stable long-term method for producing C5-aldehydes

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 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.

[object Object]

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 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 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

The invention relates to a process for the continuous preparation of aldehydes and/or alcohols having at least 6 carbon atoms by multistage hydroformylation of olefins or olefin mixtures having at least 5 carbon atoms in the presence of unmodified cobalt complexes, in which at least two reactors are operated at different temperatures in the temperature range from 100 to 220&#xb0; C. and pressures of from 100 to 400 bar, which is characterized in that

Multistage continuous process for the hydroformylation of higher olefins or olefin mixtures

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.

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Marl, Germany

Hans-Gerd Lueken