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Eugen Gehrer

Wolfgang Harder

Klaus Ebel

Thomas Narbeshuber

Johann-Peter Melder

Joaquim Henrique Teles

Karsten Eller

Carsten Groening

Rolf Hartmuth Fischer

Ulrich Steinbrenner

Christoph Sigwart

Regina Meyer

Klemens Massonne

Georg Heinrich Grosch

Andreas Henne

Michael Trefzer

Rainer Becker

Hans Peter Rath

Hermann Gausepohl

Rudolf Kummer

Ulrich E Muller

Martin Fischer

Uwe Dingerdissen

Heinz-Josef Kneuper

Peter Stops

John-Bryan Speakman

Reinhard Lorenz

Michael Baier

Ulrich Treuling

Shelue Liang

Matthias Eiermann

Harald Larbig

Herbert Vogel

Juergen Schossig

Dieter Junge

Christopher William Rieker

Lorenz Siggel

Gunter Lauth

Richard Thoma

Manfred Barl

Bernhard Knuth

Giorgio Greening

Gunther Effler

A process for preparing halogen-free, reactive polyisobutene having a terminal double bond content of more than 50 mol % and an average molecular weight M of 280-10000 dalton by the cationic polymerization in the liquid phase of isobutene or hydrocarbon mixtures comprising isobutene comprises polymerizing at from &minus;30&deg; C. to &plus;40&deg; C. in the presence of a heterogeneous polymerisation catalyst comprising one or more oxides of the elements of transition groups V and VI of the Periodic Table of the Elements or in the presence of a heterogeneous polymerization catalyst comprising one or more oxidic compounds of one or more elements of transition groups V and VI of the Periodic Table of the Elements supported on a non-zeolitic oxidic support material which is not an oxygen-containing zirconium compound, the catalyst not containing a technically effective amount of halogen.

Method for producing halogen-free reactive polyisobutene

A catalyst comprising at least one alkali metal and at least one metallic or semimetallic promoter selected from the group consisting of Ca, Sr, Ba, Ag, Au, Zn, Cd, Hg, In, Tl, Sn, As, Sb and Bi, on a support which may be doped with one or more compounds of an alkali metal and/or alkaline earth metal, where the alkali metal/support ratio by weight is from 0.01 to 5, the promoter/alkali metal ratio by weight is from 0.0001 to 5 and, when a dopant is present, the dopant/support ratio by weight is from 0.01 to 5.

Preparation of a basic catalyst avoiding high temperatures

Preparation of halogen-free, reactive polyisobutene

Multi-metal cyanide complexes as catalysts and their use in preparing polyetherpolyols

The catalyst comprising at least one alkali metal on a spinel or inverse spinel as carrier may be doped with at least one compound of an alkali metal and/or alkaline earth metal, where the alkali metal/carrier ratio by weight is from 0.01 to 5 and, when a dopant is present, the dopant/carrier ratio by weight is from 0.01 to 5. The spinel therein has formula (I) and the inverse spinel has formula (II)

Catalyst and side-chain alkylation therewith

The catalyst comprises at least one alkali metal on a doped carrier, where the doped carrier can be prepared from at least one zirconium and/or alkaline earth metal compound as carrier and at least one alkali metal compound as dopant and calcining the doped carrier at 350.degree. C. or below, the alkali metal/carrier ratio by weight being from 0.01 to 5 and the dopant/carrier ratio by weight being from 0.01 to 5.

Catalyst for side-chain alkylation

In a process for preparing N-alkenylcarboxamides by dehydration of N-(2-hydroxyalkyl)carboxamides and/or diethers thereof in the presence of a catalyst, molecular sieves, in particular zeolites, are used as catalyst.

Preparation of N-alkenylcarboxamides

Method of producing reactive halogen-free, polyisobutene

A process for preparing diarylethanes of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each hydrogen or C.sub.1 -C.sub.8 -alkyl, by reacting aromatic compounds of the general formula II ##STR2## where R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 have the abovementioned meanings, with styrenes of the general formula III ##STR3## where R.sup.1 has the abovementioned meanings, at from -20 to 300.degree. C. under from 1 to 100 bar in the presence of heterogeneous catalysts, wherein beta-zeolites or mordenites are used as heterogeneous catalysts.

Preparation of diarylethanes

In a process for preparing unsubstituted or substituted 1,1-diphenylethanes by catalytic reaction of benzene and styrene in the presence of a zeolite catalyst, it being possible for benzene and styrene each independently to have 1 to 5 substituents selected from halogen, C.sub.1-10 -alkyl, C.sub.1-10 -alkoxy, C.sub.1-10 -acyl, C.sub.1-10 -acyloxy or cyano, the zeolite catalyst is of the EMT or ZSM-20 type.

Preparation of 1,1-diphenylethanes

Diarylethanes of the formula I ##STR1## where R.sup.1 is hydrogen or C.sub.1 -C.sub.8 -alkyl, are prepared by reacting benzene with a styrene of the formula III ##STR2## where R.sup.1 has the abovementioned meanings, by a process in which the reaction is carried out batchwise or continuously in the liquid or supercritical phase at from 150.degree. to 350.degree. C. and from 5 to 200 bar in the presence of a strongly acidic large-pore zeolite.

A process for preparing an amine by catalytic reaction of an olefin with ammonia or a primary or secondary amine by contacting a mixture of the reactants in a reactor at 200.degree. to 400.degree. C. and an elevated pressure up to 700 bar in the presence of a catalyst consisting essentially of an X-ray amorphous (non-crystalline) mesoporous catalyst, some of which may have a microporous non-crystalline content. The catalyst has the composition

Preparation of amines

A process for preparing amines of the formula I ##STR1## where R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5 and R.sup.6 are each hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.2 -C.sub.20 -alkynyl, C.sub.3 -C.sub.20 -cycloalkyl, C.sub.4 -C.sub.20 -alkylcycloalkyl, C.sub.4 -C.sub.20 -cycloalkylalkyl, aryl, C.sub.7 -C.sub.20 -alkylaryl or C.sub.7 -C.sub.20 -aralkyl,

Preparation of amines from olefins over hexagonal faujasites

Mixtures which contain silver with a particle diameter of from 0.001 to 5 .mu.m on a neutral or basic non-zeolite carrier oxide of elements of group IIa, IIIa, IIb, IIIb of the Periodic Table of the Elements, of the lanthanides or mixtures thereof, and a process for preparing these mixtures and antibiotic compositions which comprise these mixtures are described.

Mixtures containing fine metallic silver particles on a neutral to basic

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Ludwigshafen, Germany

Eugen Gehrer