Basf Aktiengesellschaft

Basf Magnetics Gmbh

Celanese International Corporation

Exxonmobil Research and Engineering Company

Celanese Chemicals Europe Gmbh

Celanese Gmbh

Symyx Technologies, Inc.

Aventis Research & Technologies Gmbh & Co Kg

Basfaktiengesellschaft

Hoechst Research & Technology

Alfred Hagemeyer

Uwe Dingerdissen

Hartmut Hibst

David M Lowe

Valery Sokolovskii

Anthony F Volpe

Jun Han

Otto Watzenberger

Axel Deimling

Barbara F Kimmich

Joaquim Henrique Teles

Stephen John McCarthy

Yumin Liu

Klaus Kuhlein

Ioan Nicolau

Tao Wang

Karin Yaccato

Leslie E Wade

Hans-Peter Schildberg

Gunter Lauth

Johannes Heitz

Victor Wong

Dieter Baeuerle

Thomas Lautensack

Andreas Manz

Prasenjeet Ghosh

Jon M Mcconnachie

Prasanna Joshi

Norbert Rieber

Chuansheng Bai

Daniel Mark Giaquinta

Klemens Flick

Dirk Demuth

Zhiguo Hou

Franz Josef Brocker

Jason Wu

Klaus Breuer

Christopher William Rieker

El-Mekki El-Malki

Peter Trubenbach

Pallassana S Venkataraman

Harald Werner

Klaus K&uuml;hlein

Roland Fischer

Jeff Elks

Jon M McConnachie

Zhigou Hou

Tom Witzel

Klaus Harth

Guido Voit

Jean Willem Beeckman

Lynn Van Erden

Dieter Hermeling

Hans Millauer

Claus G Lugmair

Daniel Heineke

Hans J Richter

John M Thomas

Gerd Fischer

Peter W Jacobs

Wolfgang Hoffmann

Rolf Peter Schulz

Heinz Alexander

Jurgen Schweinzer

Brian F G Johnson

Wolfgang Buchele

Wolfgang Jurgen Popel

Sylvain Lazare

Matthias Bolle

D S Shephard

T Maschmeyer

Anthony F Volpe, Jr

Martin Tr&ouml;mel

Andreas P&uuml;ttner

Stephen John Mccarthy

Ei-Mekki El-Malki

Jeffrey Thomas Elks

El-Mekki El Malki

The present invention addresses at least four different aspects relating to catalyst structure, methods of making those catalysts and methods of using those catalysts for making alkenyl alkanoates. Separately or together in combination, the various aspects of the invention are directed at improving the production of alkenyl alkanoates and VA in particular, including reduction of by-products and improved production efficiency. A first aspect of the present invention pertains to a unique palladium/gold catalyst or pre-catalyst (optionally calcined) that includes rhodium or another metal. A second aspect pertains to a palladium/gold catalyst or pre-catalyst that is based on a layered support material where one layer of the support material is substantially free of catalytic components. A third aspect pertains to a palladium/gold catalyst or pre-catalyst on a zirconia containing support material. A fourth aspect pertains to a palladium/gold catalyst or pre-catalyst that is produced from substantially chloride free catalytic components.

Layered support material for catalysts

Bulk metallic catalysts comprised of a Group VIII metal and a Group VIB metal and methods for synthesizing bulk metallic catalysts are provided. The catalysts are prepared by a method wherein precursors of both metals are mixed and interacted with at least one organic acid, such as glyoxylic acid, dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

Bulk group VIII/group VIB metal catalysts and method of preparing same

Supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, and an organic additive, and methods for synthesizing supported metallic catalysts are provided. The catalysts are prepared by a method wherein precursors of both metals are mixed and interacted with at least one organic additive, dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

High activity supported distillate hydroprocessing catalysts

Halide free precurors for catalysts

Rhodium containing catalysts

Methods and apparatus for combinatorial (i.e., high-throughput) materials research, such as catalysis research, that involves parallel apparatus for simultaneously effecting mechanical treatments such as grinding, mixing, pressing, crushing, sieving, and/or fractionating of such materials are disclosed. The methods and apparatus are useful for mechanically treating catalysis materials and other solid materials, including without limitation, electronic materials such as phosphors, colorants such as pigments, and pharmaceuticals such as crystalline drugs or drug candidates. The simultaneous protocols and parallel apparatus offer substantial improvements in overall throughput for preparing arrays of materials, such as catalysis materials.

Methods and apparatus for mechanical treatment of materials such as catalysts

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

Method for producing catalysts containing metal nanoparticles on a porous support, especially for gas phase oxidation of ethylene and acetic acid to form vinyl acetate

Supported catalysts having a high sintering stability and a process for producing them

A layered catalyst support or carrier provides a core member for carrying out non-steady state heterogeneously catalyzed processes where reaction gases and their products come in contact with a conventional catalyst applied to the carrier. The support as a carrier is made up of a large number of individually shaped particulate bodies or monolithic packings to be loaded into a reactor and maintained as a fluidized bed or a fixed bed during the non-steady state reaction and the recovery of the products. The support or carrier may consist of glass, quartz, oxides, nitrides, aluminosilicates, magnesium silicates, metals and carbon or their mixtures. Each shaped particle or monolithic packing of this core support is then completely enclosed by depositing thereon a thin protective layer of a nitride, oxide, carbide or chloride of a metal, a non-metal or a mixture thereof, which exhibits a dense, pore-free microstructure and a nonpolar surface having a very low density of acid centers. This outer layer is applied to the core support by a plasma-assisted gas phase deposition. The catalytically active layer is then applied to this protective layer.

Catalyst beds for non-steady state processes

The active phase of a catalyst composition contains at least one bismuth oxide compound in which bismuth is present at least partly in oxidation state &plus;5, the bismuth oxide compound furthermore containing at least one basic metal component stabilizing the oxidation state &plus;5, and said catalyst composition is used in oxidation and dehydrogenation reactions under heterogeneous catalysis, in particular the preparation of chlorine from hydrogen chloride.

Bismuth-containing catalysts

Process for the catalytic oxidation of 1,5-dialkylbicyclo(3.2.1)octan-8-ol to give 1,5 dialkylbicyclo(3.2.1)octan-8-one

Compounds of the formula I and II ##STR1## where R.sup.1 is hydrogen or an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical or an acyl radical, it being possible for these radicals to carry further substituents which do not react with acetylenes or allenes, and the radicals R, independently of one another, are hydrogen or aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radicals which may be linked to one another with formation of a ring and m is 0 or 1, are prepared by an addition reaction of a compound of the formula III

Addition reaction of hydroxyl-containing compounds with alkynes or

Polybetaine-stabilized, palladium-containing nanoparticles, a process for preparing them and also catalysts prepared from them for producing vinyl acetate. The invention relates to soluble nanoparticles which comprise palladium alone or palladium together with metals of the groups 8-11 of the periodic table and which are embedded in protective colloids, wherein the protective colloids comprise at least one polymer having betaine groups, and to a process for preparing them. The soluble nanoparticles are suitable for the preparation of catalysts.

Polybetaine-stabilized, palladium-containing nanoparticles, a process

Compounds of the formulae I and II ##STR1## are prepared by an addition reaction of a compound of the formula III

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Rheine, Germany

Alfred Hagemeyer