Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Degussa - Huls Ag

Thomas Swan & Co. Limited

E.i. Dupont De Nemours and Company

Evonik Roehm Gmbh

Asta Medica, Aktiengesellschaft

Degussa-huels Aktiengesellschaft

Thomas Tacke

Thomas Haas

Peter Panster

Jan Christoph Pfeffer

Helmfried Krause

Reinhold Brand

Stefan Wieland

Andreas Freund

Florian Klasovsky

Andreas Martin

Martyn Poliakoff

Angela Koeckritz

Martin G Hitzler

Hermanus Gerhardus Lansink Rotgerink

Jens Deutsch

Hans Lansink Rotgerink

Stephen K Ross

Martin Bankmann

Thomas M Swan

Karlheinz Drauz

Matthias Beller

Helmut Mangold

Martin Roos

Herbert Tanner

Horst Bethge

Olivier Zehnacker

Roland Moller

Roland Burmeister

Heike Riedemann

Daniel Demicoli

Gerhard Sator

Claus Rehren

Johannes Ohmer

Sebastian Imm

Frank Erhardt

Alexander Schraven

Michael Volland

Roger Sheldon

Juergen Haberland

Anja Schubert

Andreas Pfennig

Marie-Dominique Przybylski-Freund

Fiona Ruth Smail

Michael Rimbach

Michiel Janssen

Dietrich Arntz

Harald Haeger

Uwe Dingerdissen

Achim Marx

Thomas Lehmann

Harald Schmidt

Frank Hubner

Christoph Kobler

Christian Lettmann

Dieter Buss

Markus Poetter

Axel Ronneburg

Harald Häger

Klaus Stingl

Jorg Sauer

Markus Pötter

Eva Maria Wittmann

Herbert Mueller

Steffen Laporte

Robert Schwarz

Gerhard Heinz

Francis P Daly

Stefan R&ouml;der

Oliver Feuer

Jutta Lang

Dahai Yu

Uwe Ohlrogge

Hendrik Magerlein

H G Lansink-Rotgerink

Martin Reisinger

Hermanus G J Lansink Rotgerink

Francis Daly

Manfred Fuchs

Hermanus Gerhardus Josef Lansink Rotgerink

Helmfried Kraus

Peter Schinke

Inge Beul

The present application relates to a process for removing an organic compound having one or more positive charges from an aqueous solution, comprising the steps a) provision of the aqueous solution comprising the organic compound and of a hydrophobic organic solution which comprises a liquid cation exchanger, where the liquid cation exchanger is hydrophobic, and where the liquid cation exchanger has one or more negative charges and an overall negative charge, b) contacting the aqueous solution and the organic solution, and c) separating off the organic solution from the aqueous solution.

Liquid cation exchanger

The invention relates to a method for removing an organic compound having one or more positive charges from an aqueous solution. Said method consists of the following steps a) the aqueous solution containing the organic compound, and a hydrophobic organic solution which contains a hydrophobic liquid cation exchanger having one or more negative charges and a negative total charge, are provided, b) the aqueous solution and the organic solution are brought into contact with each other and c) the organic solution is separated from the aqueous solution.

The invention relates to a method for the oxidation of a primary or secondary alcohol, preferably to form an aldehyde or ketone, comprising the following steps: a) providing a catalyst composition comprising at least one compound containing a nitroxyl radical, at least one NO source, at least one carbon or mineral acid or an anhydride of a carbon or mineral acid; b) producing a reaction mixture by adding at least one primary or secondary alcohol and a gas comprising oxygen and optionally one or more than one solvent to the catalyst composition from step a) or step e); c) incubating the reaction mixture from step b) at a temperature of between 0 and 100&#xb0; C. or at the boiling point of the solvent; d) simultaneously with or subsequent to step c): crystallizing the reaction product; and e) recovering the catalyst composition by removing the crystallized reaction product from the reaction mixture obtained in step d).

Continuously operable method for producing carbonyl compounds by means of a catalyst containing a nitroxyl radical

The present invention relates to a chemocatalytic liquid-phase process for the direct one-stage amination of alcohols to primary amines by means of ammonia in high yields using a catalyst system containing at least one transition metal compound and a xantphos ligand.

Process for the direct amination of alcohols using ammonia to form primary amines by means of a xantphos catalyst system

The invention relates to a process for preparing primary amines which comprises the process steps

Process for the direct amination of secondary alcohols with ammonia to give primary amines

The present invention relates to a process for preparing primary amines comprising the process steps

Process for homogeneously catalyzed, highly selective direct amination of primary alcohols with ammonia to primary amines with a high volume ratio of liquid phase to gas phase and/or high pressures

The invention relates to an improved method for releasing an organic acid, preferably a carbon, sulfone or phosphone acid, particularly an alpha or beta hydroxycarbon acid, from the ammonia salt thereof by releasing and removing ammoniac and simultaneous extraction of the released acid, having an amine as a suitable extraction means from the aqueous phase. This method corresponds to a reactive extraction. The reactive extraction of an organic acid from the aqueous ammonia salt solution thereof can be significantly improved by the use of a strip medium or carrier gas, such as nitrogen, air, water vapor or inert gases such as argon. The released ammoniac is removed from the aqueous solution by the continuous gas flow and can be resupplied into a production process. The free acid can be obtained by a method such as distillation, rectification, crystallization, reextraction, chromatography, adsorption or by a membrane method from the extraction means.

Method for producing a free acid from the salt thereof

A process for the preparation of free carboxylic acids including: A) preparation of carboxylic acid by a biological cell located in an aqueous medium with addition of an amine of formula (I) where R, Rand R, independently of one another, are identical or different, branched or unbranched, optionally substituted hydrocarbon radicals or H; B) for cases where the added amine A) is water-soluble, addition of a water-insoluble amine of formula (I), where, in A) or B), a multiphase system is obtained and the corresponding ammonium carboxylate is formed from the water-insoluble amine and the carboxylic acid; C) removal of the water-insoluble phase; and D) heating of the water-insoluble phase with release of free carboxylic acid.

Method for the production of free carboxylic acids

The invention relates to a method for producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione (I), comprising the oxidation of dianhydrohexitols (II-IV), or of corresponding hydroxy ketones, with an oxygen-containing gas in the presence of a catalyst composition, the reaction proceeding without the addition of halogen sources.

Method for producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione

Supported catalyst for the production of vinyl acetate monomer

Method of performing alkylation or acylation reactions of aromatic substrates under supercritical or near-critical reaction conditions. In particular, a method of performing Friedel-Crafts alkylation or acylation reactions is disclosed under those conditions. Friedel-Crafts reactions may be effected using a heterogeneous catalyst in a continuous flow reactor containing a super-critical or near-critical reaction medium. Selectivity of product formation can be achieved by varying one or more of the temperature, pressure, catalyst, flow rates and also by varying the ratios of aromatic substrate to acylating or alkylating agent.

Acylation reactions of aromatic substrates

Moldings based on pyrogenic silicon dioxide with a pore volume of 0.5 to 1.8 ml/g are prepared by homogenizing pyrogenic silicon dioxide with methylhydroxyethyl cellulose, wax and polyethylene glycol with the addition of water, subjecting this mixture to a compounding and shaping process, extruding, optionally cutting the extrudate to the desired length using a cutting device, drying at a temperature of 70&deg; to 150&deg; C. and conditioning for a period of 30 minutes to 10 hours at a temperature of 400&deg; to 1200&deg; C. The moldings may be used as catalysts or catalyst supports for the preparation of vinyl acetate monomer, the hydration of ethylene and the hydration of propylene.

Moldings based on pyrogenic silicon dioxide

Moldings including pyrogenic mixed oxide and the use thereof

Moldings based on silica having a hollow cylindrical configuration with internal reinforcing stays or spokes leading from an inner wall of a hollow cylinder to the center of the molding or in the form of miniliths having passageway channels therethrough, are produced by homogenizing silica with methyl hydroxyethyl cellulose, wax and/or polyethylene glycol. Water and optionally aqueous alkaline ammonia solution are added, and the mixture is subjected to kneading and forming, extruding, optionally cutting the extrudate to the desired length by means of a cutting device, drying at a temperature from 20 to 150&deg; C., and annealing for a period from 30 minutes to 10 hours at a temperature of 400 to 1200&deg; C. The moldings can be used as catalyst supports for the production of unsaturated esters from olefins, organic acids and oxygen in the gas phase and and can be used in particular for the production of vinyl acetate monomer.

Moldings based on silica

A process for the continuous catalytic conversion of organic compounds, that, together with unwanted attendant materials, form a starting substance: first the organic compounds of the starting material are purposely extracted by means of condensed fluids. Then the extract, containing the condensed fluids and organic compounds as the reaction mixture is contacted with a catalyst for the catalytic conversion of the organic compounds to form a product mixture, which contains the individual products of the catalytic conversion. The product mixture is separated from the reaction mixture and the fluids employed are, optionally, conducted back for extraction.

Process for the continuous catalytic transformation of organic compounds

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Paducah, KY, United States of America

Thomas Tacke