Hoechst Aktiengesellschaft

Celanese Chemicals Europe Gmbh

Ruhrchemie Aktiengesellschaft

Oxea Corporation

Oq Chemicals Corporation

Wolfgang Greb

Helmut Bahrmann

Ernst Wiebus

Peter Lappe

Peter Heymanns

Thomas Muller

Jurgen Szameitat

Carl Dieter Frohning

Wilfried Fenske

Hans Bohnen

Kurt Schalapski

Wolfgang Zgorzelski

Klaus Bergrath

Heinz Kalbfell

Georg Dambkes

Michael Riedel

Richard Fischer

Robert Eckl

Wolfgang Zgorzel-Ski

Florian Rampf

Boy Cornils

Jurgen Weber

Helmut Springer

Hanswilhelm Bach

Werner Konkol

Wilhelm Gick

Rainer Lukas

Gregor Deckers

Jörg Arnold

Harald Kappesser

Klaus Schmid

Gregor Meier

Thomas M Uller

Ruben Fernandez Diaz

Alexander Hensel

Jörg Botterhuis

Thomas M&uuml;ller

J Urgen Szameitat

Eberhard Von Mulmann

Mariola R&ouml;tzheim

Klaus Denkmann

J&uuml;rgen Szameitat

Thomas Klein

Andreas Fischbach

Norbert SCHÖPPER

Barbara Berghahn

Gregor Konietzny

The present invention relates to a continuous two-phase hydroformylation process for the production of aldehydes from olefins by means of carbon monoxide, hydrogen and a transition metal catalyst in a reaction zone, the transition metal being in the form of a water-soluble catalyst complex, wherein the process comprising the following steps once or several times: a) hydroformylating by reacting the olefins, carbon monoxide and hydrogen over a water-soluble transition metal catalyst comprising water-soluble organophosphorus ligands in the reaction zone; b) reducing the concentration of the olefins in the reaction zone by reducing the olefin feed to the reaction zone and withdrawing at least a portion of the catalyst solution from the reaction system, wherein the catalyst solution withdrawal and olefin concentration reduction substeps may occur in this or reverse order, simultaneously or sequentially;c) feeding a solvent, a transition metal source and water-soluble organophosphorus ligands to the reaction system, wherein the feeding of the components may occur simultaneously or in any order sequentially;d) increasing the concentration of the olefins in the reaction zone by increasing the olefin feed to the reaction zone and hydroformylating by reacting the olefins with carbon monoxide and hydrogen.

Continuous hydroformylation process with catalyst substitution

The invention relates to a method for reprocessing a liquid product of a hydroformylation reaction, wherein the liquid phase produced in a release stage is supplied to a separating device from which a liquid flow containing rhodium is guided away via a filter, where solids thereby separated are taken out of the process and the filtrate obtained is guided back into the hydroformylation reaction.

Method for reprocessing a liquid hydroformylation product

A process for preparing sulfonated arylphosphines by reaction of arylphosphines with oleum, wherein, after reaction of the arylphosphines with oleum, the sulfonation mixture is firstly diluted with water, an inert gas stream is then passed through the diluted sulfonation mixture until SOis no longer liberated from the diluted sulfonation mixture and the latter is then worked up further in a customary manner and its use.

Process for preparing sulfonated arylphosphines

A process for preparing solutions of sulfonated arylphosphines comprising reacting arylphosphines with oleum, diluting the sulfonation mixture with water, extracting the diluted sulfonation mixture with a solution of a water-insoluble organic solvent, reacting the organic phase with a solution of an inorganic base in water, adjusting the resulting aqueous solutin of sulfonated arylphosphines to a pH of up to 3 by addition of an acid, and passing an inert gas stream through the aqueous solution comprising sulfonated arylphosphines until sulfur is no longer liberated from the aqueous solution of sulfonated arylphosphines.

Mixtures of isomeric nonanols and decanols are obtained by joint aldol condensation of n-butanal and pentanals, and up to 1% by weight of 3-methylbutanal, hydrogenation of the aldol condensation product to the corresponding saturated alcohols, and separation from the reaction mixture of the components boiling at temperatures lower than those of the nonanols and decanols. The pentanals are mixtures of 60 to 90% by weight of n-pentanal and 10 to 40% by weight of 2-methylbutanal. The alcohol mixture is especially suitable for preparing ester plasticizers.

Isomeric nonanols and decanols, their preparation, phthalic esters obtained therefrom and their use as plasticizers

Wastewater from the aldolization reaction is purified by adjusting its pH to 0 to 6, followed by extraction with monohydric alcohols having at least 8 carbon atoms, hydrocarbons having at least 6 carbon atoms, and mixtures thereof. In some cases, adjustment of the pH causes the formation of an organic phase, which is separated from the remaining wastewater before extraction.

Process for the purification of wastewater from the aldolization reaction

For the preparation of predominantly unbranched higher primary alcohols, olefins from the Fischer-Tropsch synthesis are reacted with hydrogen and carbon monoxide in the presence of water and a catalyst which is rhodium, in metallic form or as a compound, and a water-soluble phosphine. The reaction product obtained is hydrogenated. The water-soluble phosphines employed are compounds whose anion is a phosphine containing at least one sulfonated or carboxylated aromatic radical and whose cation is a quaternary ammonium or phosphonium ion.

Process for the preparation of predominantly unbranched higher primary

Mixtures of isomeric decyl alcohols obtained by oligomerization of propylene in the presence of deactivated zeolites as catalysts, followed by separation of the nine carbon olefins from the oligomer mixture, then hydroformylation of the 9 carbon olefins to 10 carbon aldehydes, and hydrogenation of the aldehydes to the corresponding alcohols. The mixtures, when esterified with phthalic acid, or anhydride, provide a mixture of isomeric di-decyl phthalates that can be used as plasticizers.

Mixtures of isomeric decyl alcohols, phthalates obtainable therefrom,

Process for making a mixture of isomeric decyl alcohols

Mixtures of isomeric decyl alcohols prepared by hydroformylation of mixtures of butene-1 and butene-2 in two stages to give aldehyde mixtures, and condensation of the aldehyde mixtures to form an aldol mixture, followed by separation and hydrogenation. The first stage of the hydroformylation proceeds in the presence of rhodium catalysts dissolved in water, the second stage in the presence of cobalt catalysts homogeneously dissolved in the reaction medium. The mixture of isomeric decyl alcohols, when esterified with phthalic acid, yields a mixture of isomeric decyl phthalates which are useful as plasticizers.

Decyl alcohol mixtures, phthalic esters obtainable therefrom and their

Isomeric mixtures of pentanoic acids are prepared by subjecting butene-1/butene-2 mixtures to hydroformylation to form aldehyde mixtures, followed by oxidation of the aldehyde mixtures which have been separated off from the reaction product. The hydroformylation is carried out in a heterogeneous system in the presence of rhodium catalysts which are dissolved in water. The mixture of isomeric 5 carbon monocarboxylic acids produced, when esterified with polyhydric alcohols, yields mixtures of isomeric esters which are useful as lubricants for refrigerant compressors operated with chlorine-free, at least partly fluorinated hydrocarbons as the refrigerant.

Mixtures of isomeric pentanoic acids, esters prepared therefrom, and

Mixtures of isomeric decyl alcohols obtained by hydroformylation of butadiene to produce aldehyde mixtures, condensation of the aldehyde mixtures, isolated from the reaction product, to form an aldol mixture, and isolation and hydrogenation of the aldol mixture. The mixture of isomeric decyl alcohols, esterified using phthalic acid, gives a mixture of isomeric decyl phthalates which are plasticizers having excellent cold properties.

Decyl alcohol mixtures, phthalic obtainable therefrom, and their use as

Mixtures of isomeric decyl alcohols are obtained by hydroformylation of 1-butene- and 2-butene-containing mixtures in two stages to give aldehyde mixtures, condensation of the isolated and combined aldehyde mixtures to form an aldol mixture, and isolation and hydrogenation of the aldol mixture. The mixture of isomeric decyl alcohols, esterified with phthalic acid, gives a mixture of isomeric decyl phthalates which are useful as plasticizers.

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Dinslaken, Germany

Wolfgang Greb