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Aventis Research & Technologies Gmbh & Co Kg

Celanese Chemicals Europe Gmbh

Celanese International Corporation

Hoechst Research & Technology Deutschland Gmbh & Co. Kg

Celanese Gmbh

Ticona Gmbh

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Evonik Degussa Gmbh

Degussa Gmbh

Hoechst Research & Technology

Targar Gmbh

Evonik Goldschmidt Corporation

Uwe Dingerdissen

Holger Borchert

Alfred Hagemeyer

Thomas Riermeier

Axel Monsees

Renat Kadyrov

Karsten Eller

Klaus Kuhlein

Armin Boerner

Peter Trubenbach

Karlheinz Drauz

Alfred Gerhard Hagemeyer

Klemens Flick

Peter Stops

Franz Josef Brocker

Thomas Kaiser

Elke Schweers

Jens Weiguny

Jens Holz

Michael Hesse

Thomas Haas

Wolfgang Hoelderich

Matthias Beller

Rudolf Kummer

Wolfgang Anton Herrmann

Ralf Jackstell

Thomas Tacke

Andreas Henne

Eugen Gehrer

Hans Millauer

Armin Börner

Paul Knochel

Hermann Gies

Edward G Zey

Joachim Wulff-Doring

Ulrich Steuerle

Jan Christoph Pfeffer

Daniel Heineke

Harald Schmidt

Alexander Zapf

Christian Lettmann

Dorit Wolf

Stefan Verseck

Wolfgang Kroutil

David Linke

Bernd Marler

Florian Klasovsky

Stefanie Rinker

Gunter Lauth

Sabine Zeyss

Rolf Schulz

Harald Werner

Klaus K&uuml;hlein

Andreas Manz

Vitali Tararov

Rolf Peter Schulz

Ranier Roesky

Rainer Roesky

Carsten A Schneider

Boris E Bosch

Jurgen Herrmann

Roland Fischer

John Fritch

John M Thomas

George Kvakovszky

Harald Trauthwein

Thomas H Shockley

Johannes Heitz

Michael Wohlers

Michael A Hubbard

Michael Volland

Gerhard Lobmaier

Heinz Alexander

Manfred Baerns

Brian F G Johnson

Ksenia Egorova

Holger Orzesek

Michael Rimbach

Michiel Janssen

Karl-Josef Haack

Roger Sheldon

Willard C Brinegar

Werner Kind

Sabine Laschat

Christian Gruber

Thorsten Sell

Mark Sundermeier

D S Shephard

T Maschmeyer

Wilhelm Maier

Eike Hupe

Dieter B&auml;uerle

Silke Vortmann

Klaus Kühlein

Günter Dambeck

Gerhardt Geiss

Andrea Rutsch

Stephan Weidlich

Jan Pfeffer

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

The present invention relates to ligands of the general formula (I). In addition, a process for the production thereof and the use thereof are demonstrated.

Bisphosphines as bidentate ligands

The present invention relates to novel nitrogen-containing monodentate phosphane ligands of formula (I) and to their use in catalytic reactions, especially in the improvement of haloaromatic compounds. 

Nitrogen-containing monodentate phosphines and their use in catalysis

This application claims the benefit of German priority Application No. 10138140.9, filed on Aug. 9, 2001, and International Application No. PCT/EP02/08748, filed on Aug. 6, 2002. The invention relates to the production of amines by the reaction of aldehydes or ketones with ammonia or primary or secondary amines in the presence of a hydrogen-donor and the presence of homogeneous metal catalysts of the eighth sub-group under mild conditions.

Method for the production of amines by reductive amination of carbonyl compounds under transfer-hydrogenation conditions

The present invention concerns novel unsymmetrical chiral diphosphines of a mixed aliphatic-aromatic type and processes for synthesizing them, complexes of these compounds and their use as catalysts.

Cycloaliphatic/aromatic diphosphines and use thereof in catalysis

The present invention relates to a process for the selective preparation of acetic acid from a gaseous feed comprising ethane, ethylene or mixtures thereof plus oxygen at elevated temperature, which comprises bringing the gaseous feed into contact with a catalyst comprising the elements Mo, Pd, X and Y in gram atom ratios a:b:c:d in combination with oxygenMoPdXY&#x2003;&#x2003;(I)where the symbols X and Y have the following meanings:

Process for the selective preparation of acetic acid using a molybdenum and palladium based catalytic oxide

A method for the selective production of acetic acid from a gas-phase feed of ethane, ethylene, or mixtures thereof and oxygen at elevated temperatures. The gas-phase feed is brought into contact with a catalyst, containing the elements Mo, Pd, X and Y in the gram atom ratios a:b:c: in combination with oxygen according to formula (I): MOPdXY. The symbols X and Y have the following meanings: X=one or several elements chosen from the group Cr, Mn, Nb, Ta, Ti, V, Te and W; Y=one or several elements chosen from the group B, Al, Ga, In, Pt, Zn, Cd, Bi, Ce, Co, Rh, Ir, Cu, Ag, Au, Fe, Fu, Os, K, Rb, Cs, Mg, Ca, Sr, Ba, Nb, Zr, Hf, Ni, P, Pb, Sb, Si, Sn, Ti and U: the indices a, b, c, d and x=the gram atom ration for the corresponding elements, where: a=1; b&#x2014;0.0001 to 0.01; c=0.4 to 1; and d=0.005 to 1, wherein the space-time yield for the above oxidation to yield acetic acid is 470 kg/(hm) and the selectivity of the oxidative reaction of ethane and/or ethylene to give acetic acid is, in particular, &#x2267;70 mol %. X=preferably Nb and an ammonium salt of niobium is used as niobium source.

Method for the selective production of acetic acid by catalytic oxidation of ethane and/or ethylene

The invention relates to a method for producing a catalyst containing one or several metals from the group of metals comprising the sub-groups Ib and VIIIb of the periodic table on porous support particles, characterized by a first step in which one or several precursors from the group of compounds of metals from sub-groups Ib and VIIIb of the periodic table is or are applied to a porous support, and a second step in which the porous, preferably nanoporous support to which at least one precursor has been applied is treated with at least one reduction agent, to obtain the metal nanoparticles produced in situ in the pores of said support.

Process for producing catalysts comprising nanosize metal particles on a porous support, in particular for the gas-phase oxidation of ethylene and acetic acid to give vinyl acetate

The invention relates to a method for producing acetic acid by oxidizing ethane in fluid bed reactors with high selectivity and high yields.

Method for producing acetic acid

The invention relates to the preparation of chiral or achiral amines by reaction of aldehydes or ketones with ammonia or primary or secondary amines in the presence of hydrogen and in the presence of homogeneous metal catalysts under mild conditions. Metal catalysts which can be used are complexes of late transition metals with chiral or achiral phosphorus-containing ligands.

Method for producing amines by homogeneously catalyzed reductive amination of carbonyl compounds

A process for the production of vinyl acetate comprising contacting in a first reaction zone a gaseous feedstock comprising essentially ethane with a molecular oxygen-containing gas in the presence of a catalyst to produce a first product stream comprising acetic acid; contacting in a second reaction zone a gaseous feedstock comprising essentially ethane with a molecular oxygen-containing gas in the product stream comprising ethylene; contacting in a third reaction one the first gaseous product stream and the second gaseous product stream with a molecular oxygen-containing gas in the presence of a catalyst to produce a fourth product stream comprising vinyl acetate; separating the product stream from step (3) and recovering vinyl acetate from said product stream from step (3).

Process for the production of vinyl acetate

The invention relates to a supported catalyst and the production and use thereof in the synthesis of vinyl acetate in the gaseous phase from ethylene, acetic acid and oxygen, or from gases containing oxygen, whereby the activity and selectivity are simultaneously improved. The catalyst contains palladium, at least one alkali metal compound and optionally one or more catalyst accelerators, in particular, gold, barium and/or cadmium on a porous support. Said support contains at least one reducible metal oxide, in particular oxides of the elements of groups IIIb, IVb, Vb, VIb from the periodic table of elements. Once the support has been loaded with at least one palladium compound, a reduction is carried out at a temperature of &#x3e;200&#xb0; C.

Catalysts for the gas-phase oxidation of ethylene and acetic acid to vinyl acetate, a process for producing them and their use

An integrated process for the production of vinyl acetate comprising the steps of: (a) containing in a first reaction zone a gaseous feedstock comprising essentially ethane with a molecular oxygen-containing gas in the presence of a catalyst to produce a first product stream comprising acetic acid and ethylene; (b) containing in a second reaction zone the first gaseous product stream with a molecular oxygen-containing gas in the presence of a catalyst to produce a second product stream comprising vinyl acetate; (c) separating the product stream from step (b) recovering vinyl acetate from the product stream from step (b).

Integrated process for the production of vinyl acetate

The invention relates to a method for producing acetic acid from ethane and oxygen on a fixed bed catalyst, characterized in that a reactor cascade with an oxygen feed between the reactor levels is used. This particularly advantageous method provides high conversion rates, highly pure acetic acid and low ethylene and carbon monoxide formation.

Method and producing acetic acid in a reactor cascade

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Seeheim-Jugenheim, Germany

Uwe Dingerdissen