Degussa Aktiengesellschaft

Degussa - Huls Ag

E.i. Dupont De Nemours and Company

Dietrich Arntz

Thomas Haas

Lukas M Von Hippel

Wolfgang Boeck

Werner Burkhardt

Willi Hofen

Gunter Prescher

Joerg Sauer

Christoph Brossmer

Johannes Heilos

Armin Neher

Mathias Hoepp

Wolfgang Hoelderich

Guenter Prescher

Reinhard Manner

Andreas Freund

Stephan Rautenberg

Manfred Sauer

Jorg Sauer

Lukas V Hippel

Norbert Wiegand

Brigitta Walter

Bernd Kuttruf

Christian Bussek

Herbert Klenk

Ralf Goedecke

Raymund Sonnenschein

Wolfgang Taugner

Marcus Morawietz

Dieter Most

Mathias Hopp

Martin Meier

Karl-Ludwig Weber

Walter Girke

Adolf Schaefer-Sindlinger

Joerg Roeseller

Peter K Kleinschmit

Stefan Wieland

Thomas Tacke

Monika Berweiler

Reinhold Brand

Wolfgang Holderich

Juan G Andrade

Rudiger Schutte

Roland Burmeister

Michael Baacke

Gerhart Eigenberger

Michael Kraft

Gerhard Friedrich

Klaus Koehler

Dahai Yu

Markus Hoelscher

Ulli Englert

Goetz-Peter Schindler

Bodo Zibrowius

Andreas Bosse-Plois

Klaus Raible

Georg Bohme

Jorg Frauhammer

Adolf Schafer

Hans-Peter Ohlinger

Stephan Bartsch

Georg Philip Heitmann

A reactor for performing endothermic catalytic reactions is disclosed formed of a monolithic counterflow reactor with parallel heating and reaction channels. The internal walls of the reaction channels are coated with a catalyst for the catalytic reaction to be performed, while the internal walls of the heating channels have a catalyst for the catalytic combustion of a fuel gas/air mixture.

Process for performing endothermic catalytic reactions

Reactor for performing endothermic catalytic reactions

A process for the production of 1,3-propanediol by heterogeneously catalyzed hydrogenation of 3-hydroxypropionaldehyde in an aqueous solution at 30 to 180&deg; C., at a hydrogenation pressure of 5 to 300 bar and a pH value of 2.5 to 7.0, wherein ruthenium on an oxide support is used as the catalyst.

Process for the production of 1,3-propanediol by hydrogenating 3-hydroxypropionaldehyde

A process for the production of 1,3-propanediol by hydrating acrolein in the presence of an ion exchanger to form 3-hydroxypropionaldehyde includes reacting acrolein and water in a ratio by weight of 1:2 to 1:20 at 30.degree. to 120.degree. C. and a pressure in the range from 1 to 20 bar, in the presence of an ion exchange hydration catalyst. The ion exchanger and any unreacted acrolein are separated from the reaction mixture. The 3-hydroxypropionaldehyde is then catalytically hydrogenated in a liquid or gas phase using hydrogenation catalysts. The ion exchanger hydration catalyst includes polyamine/polycarboxylic acid resins produced by reacting polyamine resins based on a crosslinked polyacrylamide matrix with acrylic acid, acrylic acid derivatives or a salt of an .omega.-haloalkanoic acid. An ion exchanger includes reaction product of reacting a polyamine resin based on a crosslinked polyacrylamide matrix with acrylic acid, acrylic acid derivatives or .omega.-haloalkanoic acid salts.

Process for the production of 1,3-propanediol

A process for producing polyhydroxy ethers having the formula (I) (HO).sub.(w--M) W(OV).sub.m, in which W represents an organic group and OV a structural element containing hydroxyl groups, having the formula (III) ##STR1## A multifunctional alcohol W(OH).sub.w (II) is reacted with an .alpha.,.beta.-unsaturated carbonyl compound XCH.dbd.CY--CZ.dbd.O (IV) and formaldehyde in the presence of a base. The .alpha., .beta.-unsaturated carbonyl compound (IV) and the remaining quantities of formaldehyde, multifunctional alcohol (II) and base are added continuously or periodically to an aqueous solution or suspension containing at least 10 mole % of the multifunctional alcohol (II), at least 10 to 70 mole % of the formaldehyde and at least 10 mole % of the base. Preferred multifunctional alcohols (II) are pentaerythritol, TMP and TME. Preferred carbonyl compounds (IV) are acrolein and .alpha.-alkylacrolein. New asymmetric polyhydroxy ethers are also disclosed.

Process for producing polyhydroxy ethers and unsymmetrical polyhydroxy

A method of producing .epsilon.-caprolactam from cyclohexanone in the gaseous phase using MFI catalysts on whose surface symmetrically arranged OH groups are present.

Method of producing .epsilon.-Caprolactam, MFI zeolite catalysts on

A method is disclosed of producing .epsilon.-caprolactam by the Beckmann rearrangement of cyclohexanone oxime using (B) .beta. zeolites as catalyst.

Method of producing .epsilon.-caprolactam

A process for preparing catalytically active coatings for the synthesis of hydrogen cyanide on moulded items substantially consisting of aluminum oxide. The catalytically active coatings contain, as active components, at least one platinum group metal and a nitride waich are applied to the moulded item by means of a coating dispersion which contains the active components as finely divided solids. This means that the hitherto conventional production of aluminum nitride during the forming process is not required. The coatings therefore achieve their final activity level, which is well above that of conventional coatings, very rapidly. In addition, these catalysts can be started up under high load and have a lower operating temperature.

Process for preparing catalytically active coatings for the synthesis of

Reactor heads for the feed and withdrawal of a fuel gas/air mixture and of an educt gas mixture into the heating ducts and reaction ducts respectively of a monolithic countercurrent reactor. The reactor heads are provided with guide pipes, which feed the gas mixtures into the ducts assigned to them and withdraw them from these ducts.

Reactor head for a monolithic co-current or countercurrent reactor

A catalyst for the synthesis of methyl mercaptan from hydrogen sulfide and methanol as well as a process for preparation of the catalyst. The catalyst is an active aluminum oxide onto which 5 to 25% by weight potassium tungstate is deposited as an activator. A two-stage impregnation with intermediate drying produces a catalyst which exhibits distinctly better selectivity for formation of methyl mercaptan than catalysts obtained by single-stage impregnation.

Catalyst, process for its preparation, and use for synthesis of methyl

An ammoxidizable compound is reacted with an ammonium salt, especially an inorganic ammonium salt, in the presence of a source of oxygen and an ammoxidation catalyst at 100 to 700.degree. C., preferably 200 to 700.degree. C., in order to produce cyano compounds of the formula R--CN, in which R is H or an organic group.

Method of producing cyano compounds by ammoxidation

A process for preparing 3-hydroxyalkanals having 3 to 12 carbon atoms by hydration of 2-alkenals with homogeneous catalysis, by using as catalyst a compound corresponding to the formula ##STR1## wherein: z denotes H, C.sub.1 - to C.sub.6 -alkyl, --CH.sub.2 --CH(CH.sub.3) --Y' or --(CH.sub.2).sub.o --Y'

Process for preparing 3-hydroxyalkanals

A process for preparing catalytically active coatings for the synthesis of hydrogen cyanide on moulded items substantially consisting of aluminum oxide. The catalytically active coating contain, as active components, at least one platinum group metal and a nitrate which are applied to the moulded item by means of a coating dispersion which contains the active components as finely divided solids. This means that the hitherto conventional production of aluminum nitride during the forming process is not required. The coatings therefore achieve their final activity level, which is well above that of conventional coatings, very rapidly. In addition, these catalysts can be started up under high load and have a lower operating temperature.

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Oberursel, Germany

Dietrich Arntz