Degussa Aktiengesellschaft

Other

Degussa - Huls Ag

Bayer Aktiengesellschaft

Deutsche Gold- Und Silber-scheideanstalt Vormals Roessler

Degussa-huels Aktiengesellschaft

Tunap Industrie Chemie Gmbh - Co. Produktions Kg

Peter Panster

Peter K Kleinschmit

Stefan Wieland

Thomas Tacke

Ulrich Deschler

Robert Gradl

Wolfgang Buder

Horst Grethe

Helmfried Krause

Rudolf Michel

Reinhold Brand

Ralf Janda

Thomas Goebel

Siegfried Wolff

Monika Berweiler

Andreas Freund

Daniel Ostgard

Roland Burmeister

Lothar Schneider

Claus Rehren

Ewe-Hong Tan

Hermanus Gerhardus Lansink Rotgerink

Hans Lansink Rotgerink

Hans-Juergen Klockner

G&uuml;nter Stephani

Werner Obrecht

Klaus Deller

Christoph Batz-Sohn

Hartmuth Buding

Friedrich Bittner

Alfons Karl

Werner Will

Bertrand Despeyroux

Ralf Schmoll

Rainer Siegmeier

Heike Riedemann

Jorg Munzenberg

Gustaaf Goor

Steffen Laporte

Roland Heidenreich

Matthias Prinz

Karl-Heinz Koenig

Stefan R&ouml;der

Martin Bankmann

Friedrich Spruegel

Petra Look-Herber

Oliver Feuer

Rudolf Mueller

Elske Schopenhauer-Gehrmann

Jürgen Krauter

Jörg Pietsch

Klaus Köhler

Christian Hecht

Peter Kleinschmidt

Peter Goetz

Arno Jaenes

Hendrik Magerlein

Christian Brandes

Ute Werner

Klaus Zinsmeister

Michael Albert

Marion Langen

Ivo Vryens

H G Lansink-Rotgerink

Inge Beul

Marlies Englisch

The invention relates to a method for carrying out CC-coupling reactions, in particular a Heck and Suzuki reaction, in the presence of supported palladium as the catalyst and a base in a monophase or multiphase solvent mixture. According to said method, palladium detaches itself from the support in a characteristic manner, is redeposited after the reaction and the quantity of palladium not deposited after the reaction is significantly lower than 5000 ppm, in relation to the palladium used.

Method for carrying out-CC-coupling reactions

Metal catalysts comprising hollow forms or spheres are made of metal alloy and optionally activated. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, and/or hydration reaction of organic compounds.

Metal catalysts

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

Propyl silanes functionalized in 3-position are produced by catalytically reacting allyl compounds of the formula H C&boxH;CH&mdash;CH X with silanes of the formula R R R SiH and using a 3- to 100-fold excess of silane.

Process for the production of propyl silanes functionalized in 3-position

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

Compacts based on pyrogenically produced silicon dioxide

The use of modified silicon dioxide as a catalyst support in catalytic reactions under hydrothermal conditions is described. The pore structure of the supports may be stabilized against hydrothermal reaction conditions by impregnating the catalyst supports with elements of Group IVB of the Periodic Tube of Elements.

Use of catalysts based on catalyst supports containing silicon dioxide

A process for producing carboxylic acid esters by the following steps:

Process for producing carboxylic acid esters and catalysts therefor

A catalyst for the dehydrogenation of C.sub.6 -C.sub.15 paraffins is disclosed. The catalyst contains, on support, at least one platinum group component, at least one promoter component from the group tin, germanium and lead, and at least one additional modifier. The additional modifier contains at least one alkaline earth metal. The stability of the catalyst is essentially higher than that achieved by conventional use of an alkali metal.

Catalyst for the dehydrogenation of C.sub.6 -C.sub.15 paraffins and to a

Disclosed are shell catalysts which contain, on powdered or shaped supports, one or more metals from groups VIII and IB of the Periodic Table of Elements. The catalysts are obtained by coating the support with the catalytically active metals in aqueous solutions of mono- or bimetallic colloids of these metals, wherein the colloids are stabilized by highly hydrophilic surfactants.

Shell catalysts, processes for their preparation and their use

A process for the production of bis(silylorganyl)-polysulphanes of the formula

Process for the production of bis (silyorganyl) polysulphanes

A catalyst for the dehydrogenation of C6.sub.6 -C.sub.15 paraffins is disclosed. The catalyst contains, on a support, at least one platinum group component, at least one promoter component from the group tin, germanium and lead, and at least one additional modifier. The additional modifier contains at least one alkaline earth metal. The stability of the catalyst is essentially higher than that achieved by conventional use of an alkali metal.

A process is disclosed for continuously hydrogenating unsaturated fats, fatty acids or fatty acid esters on a shaped catalyst in a solid bed. The reactants flow over the catalyst in the presence of a medium or solvent mixture in supercritical conditions. This leads to considerably improved activity and selectivity of the hydrogenation reaction compared with conventional trickle bed hydrogenation processes.

Hardening of unsaturated fats, fatty acids or fatty acid esters

A process for the impregnating and priming treatment of mineral building materials of synthetic or natural origin using aqueous suspensions or solutions which contain at least one silicon-containing ion exchanger of the formula

Process for the treatment of mineral building materials

Growing community of inventors

Rodenbach, Germany

Peter Panster