Basf Aktiengesellschaft

Basfaktiengesellschaft

Basf Aktiengsellschaft

Basf Altiengesellschaft

Rainer Becker

Bruno Wuerzer

Dieter Jahn

Michael Keil

Ulrich Schirmer

Norbert Meyer

Karsten Eller

Norbert Goetz

Michael Hesse

Rolf Hartmuth Fischer

Wolfgang Rohr

Walter Seufert

Walter Himmele

Christoph Sigwart

Andreas Henne

Wolfgang Spiegler

Hans Theobald

Wolfgang Reif

Horst Neuhauser

Heinz-Josef Kneuper

Dieter Kolassa

Volkmar Menger

Johann Jung

Wolfgang Mackenroth

Wilhelm Rademacher

Hardo Siegel

Ernst Buschmann

Klemens Massonne

Frank Stein

Peter Stops

Gerd Heilen

Heinz Eckhardt

Johann-Peter Melder

Ulrich Mueller

Peter Plath

Wolfgang Hoelderich

Boris Breitscheidel

Bernd Wolf

Rudolf Kummer

Thomas Kuekenhoehner

Tom Witzel

Eberhard Fuchs

Matthias Irgang

Adolf Parg

Walter Gramlich

Ulrich M&uuml;ller

Roman Dostalek

Franz Josef Brocker

Uwe Vagt

Joachim Simon

Winfried Richarz

Karin Sperling-Vietmeier

Juergen Schossig

Horst Zimmermann

Karl Siegfried Brenner

Franz Merger

Bernd Bruchmann

Axel Sanner

Rolf Pinkos

Helmut Reichelt

Joachim Paust

Arno Lange

Gerd Kaibel

Christoph Kuenast

Klaus Bronstert

Werner Hoffmann

Peter Hofmeister

Bernd Wenderoth

Norbert Gotz

Dieter Hermeling

Walter Dobler

Roger G Klimesch

Eckhard Hickmann

Eugen Gehrer

Harald Schwahn

Knut Oppenlander

Wolfgang Krieg

Detlef Kratz

Siegfried Winderl

Rudolf Kropp

Rolf-Dieter Acker

Lothar Franz

Arthur H&ouml;hn

Karl-Heinz Ross

Frank-Friedrich Pape

Joachim Wulff-Doring

Manfred Eggersdorfer

Lothar Janitschke

Lothar Karrer

Clemens Grund

Klaus Mundinger

Wolfgang Franzischka

Erhard Henkes

Dietmar Bender

Juergen Varwig

Wolfgang Gunther

Heinz-Guenter Oeser

Gerhard Laqua

Peter Weidlich

Paul Guenthert

The invention relates to a method for producing the tautomeric form (I) of 2,4,6-trianilino-p-(carbo-2'-ethylhexyl-1&#x2032;-oxy)-1,3,5-triazine by the crystallization of a tautoner mixture in the presence of one or more solvents selected from the group consisting of aliphatic alcohol having 2 8 C-atoms made of aliphatic alcohol, aliphatic carboxylic acid alkyl esters having a total of between 3&#x2013;10 C-atoms, aromatic carboxylic acid alkyl esters having a total of between 8&#x2013;12 C-atoms, aliphatic carboxylic acid esters having a total of between 3 9 C-atoms, carboxylic acid nitriles having a total of between 2&#x2013;8 C-atoms, dialkylketones having a total of between 3&#x2013;6 C-atoms and aliphatic sulphones having a total of between 3&#x2013;6 C-atoms. The solvent or solvent mixture can additionally contain up to 30 wt % of a hydrocarbon (I) acts as a light protecting agent in cosmetic preparations.

Method for producing the tautomeric form of (1) of 2,4,6-trianilino-p-(carbo-1'-ethylhexyl-1&#x2032;oxyl)-1, 3, 5-triazine

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

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

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

Process for preparing 1,4-butanediol by catalytic hydrogenation of 1,4-butinediol

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.

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Bad Durkheim, Germany

Rainer Becker