Basf Aktiengesellschaft

Karsten Eller

Rainer Becker

Rudolf Kummer

Michael Hesse

Christoph Sigwart

Rolf Hartmuth Fischer

Peter Stops

Klaus-Dieter Plitzko

Eugen Gehrer

Heinz R&uuml;tter

Uwe Dingerdissen

Heinz-Josef Kneuper

Andreas Henne

Frank Stein

Ulrich M&uuml;ller

Peter Bassler

Wolfgang Harder

Norbert Rieber

Martin Fischer

Michael Schulz

Gerd Heilen

Matthias Dernbach

Wolfgang Friedrich

Jurgen Herrmann

Bernd Fiege

Joaquim Henrique Teles

Ulrich Mueller

Jochem Henkelmann

Rolf Pinkos

Gerd Kaibel

Tom Witzel

Klemens Massonne

Achim Stammer

Georg Heinrich Grosch

Norbert Gotz

Eberhard Fuchs

Heinz-Walter Schneider

Stefan Rittinger

Hartmann Konig

Arthur H&ouml;hn

Arnd B&ouml;ttcher

Anton Meier

Volkmar Menger

Daniel Heineke

Andreas Walch

Thomas Narbeshuber

Anne Wenzel

Alfred Thome

Ulrich Klein

Peter Wahl

Peter Lingelbach

Gunter Lauth

Manfred Barl

Stefan Quaiser

Gert Treiber

Rolf Lebk&uuml;cher

Veronika Kohl

Hans-Werner Langensiepen

Gunther Effler

Hans-Jurgen Lutzel

Jurgen Dembowski

Process for making &ggr;-alkoxyamines

Method for processing pTHF polymerization catalysts

Method for oxidizing an organic compound containing at least one C-C double bond

A process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters of these polymers comprises polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer over a heterogeneous catalyst comprising hectorite.

Method for producing polytetrahydrofuran

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

Process for preparing aromatic polyamine mixtures

In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof comprises polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer over an acid-activated calcium montmorillonite as catalyst, the calcium montmorillonite has a BET surface area of at least 300 m /g, an acidity of at least 0.02 mmol/g at pK <&minus;3 and a pore volume of at least 0.40 cm /g for pore sizes in the range from 30 to 200 &angst;.

Catalyst and method for the production of polytetrahydrofuran

A process for polymerizing cyclic ethers over a heterogeneous catalyst comprises using a heterogeneous catalyst comprising one or more pillared interlayered clays (PILCs).

Method for polymerizing cyclic ether

Hydrogenation of aldehydes

Preparation of amines from olefins over zeolites having an NES structure

In a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers or diesters or monoesters thereof by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over acid-activated montmorillonite catalysts, the montmorillonite catalyst after acid activation has a ratio of montmorillonite structure to the sum of muscovite and kaolin structures, determined from the intensities of the reflections at 2&thgr;&equals;5.5&deg; for montmorillonite, 2&thgr;&equals;9.0&deg; for muscovite and 2&thgr;&equals;12.5&deg; for kaolin measured in the X-ray powder pattern, of at least 5:1.

Catalyst and method for producing polytetrahydrofuran

Method for decoloring tetrahydrofuran polymers or copolymers

Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a heterogeneous carrier catalyst which contains on an oxidic carrier material as active mass a catalytically active amount of at least one oxygenous molybdenum and/or tungsten compound and, when the precursor compounds of the active mass have been applied to the carrier material precursor, has been calcined at temperatures of between 500&deg; C. and 1000&deg; C. The catalyst used contains a promotor which comprises at least one element or a compound of an element of the 2nd, 3rd including the lanthanides, 5th, 6th, 7th, 8th or 14th group of the periodic system of elements.

Process for preparing polytetrahydrofuran

In a process for preparing polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers having a low color number by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over a heterogeneous catalyst, the polymerization is carried out in the presence of hydrogen.

Method for producing polytetrahydrofuran with low color index

A process for preparing a secondary or tertiary 2-methyl-1,5-pen-tanediamine of the formula I

Preparation of secondary and tertiary 2-methyl-1, 5-pentanediamines

Growing community of inventors

Ludwigshafen, Germany

Karsten Eller