Oxeno Olefinchemie Gmbh

Evonik Oxeno Gmbh

Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Evonik Oxenc Gmbh

Wilfried Bueschken

Alfred Kaizik

Klaus-Diether Wiese

Hans-Gerd Lueken

Michael Grass

Franz Nierlich

Dietrich Maschmeyer

Bernhard Scholz

Dirk Fridag

Armin Matthias Rix

Axel Tuchlenski

Walter Toetsch

Stefan Drees

Guido Protzmann

Dieter Hess

Markus Winterberg

Andreas Beckmann

Kurt-Alfred Gaudschun

Frank Brocksien

Dirk Roettger

Gerda Grund

Franz-Felix Kuppinger

Wilhelm Droste

Martin Trocha

Marc Becker

Dagmara Ortmann

Dieter Reusch

Jochen Praefke

Dietmar Gubisch

Oliver Moeller

Frank Hoeper

Robert Franke

Cornelia Borgmann

Armin Boerner

Goetz Baumgarten

Udo Peters

Uwe Ernst

Udo Lenz

Stefan Buchholz

Jens Holz

Udo Knippenberg

Silvia Santiago Fernandez

Joachim Schuler

Peter Ernst Esser

Lothar Kerker

Juergen Koch

Hermann-Josef Schulte-Althoff

Patrick Muhlack

Norbert Scholz

Silvia Santiago-Fernandez

Stefan Jelko

Ralf Duessel

Andreas Stenert

Claus York Werninger

Hartmut Steinbeisser

Felix Gosmann

Dirk Mackowiak

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.

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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 mixtures of citric esters of the formula I, in which each of R, Rand Ris an aliphatic Cor Cmoiety, wherein the average chain length of the aliphatic moieties in the mixture is in the range from greater than 5 to 7, and the average degree of branching of the aliphatic Cmoieties is in the range from 0.9 to 2.2. The present invention also relates to the use of the citric ester mixture as a plasticizer in plastics compositions.

Citric ester mixtures and their use

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 invention relates to a device and a method for the continuous reaction of a liquid and a second fluid, wherein the device comprises at least two jet loop reactors interconnected in parallel and common outer liquid recirculation.

Parallelized jet loop reactors

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.

Process for separating a dissolved complex catalyst of a metal of group 4, 5, 6, 7, 8, 9 or 10 of the Periodic Table of the Elements and/or any free organophosphorus ligand present from a nonaqueous hydroformylation reaction mixture which contains an aldehyde product and an organic solvent at least one membrane which is more permeable to the hydroformylation product than to the organophosphorus ligand, the separation being carried out under a carbon monoxide partial vapor pressure of more than 200 kPa.

Method for separating organic transition metal complex catalysts

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

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

The present invention relates to the preparation of alicyclic polycarboxylic esters by ring-hydrogenation of the corresponding aromatic polycarboxylic esters on a catalyst which comprises at least one metal from the triad iron, cobalt, nickel, and at least one metal of the IInd, IIIrd, IVth, Vth, and/or VIth transition group of the Periodic Table. An alicyclic carboxylic ester mixture with a proportion above 10 mol % of the trans isomers. The use of the alicyclic polycarboxylic ester mixtures. Mixtures made from plastics and from alicyclic polycarboxylic ester mixtures.

Alicyclic polycarboxylic ester mixtures with a high trans proportion and method for the production thereof

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Haltern am See, Germany

Wilfried Bueschken