Basf Aktiengesellschaft

Basfaktiengesellschaft

Heinz R&uuml;tter

Michael Hesse

Rainer Becker

Karsten Eller

Jochem Henkelmann

Arnd B&ouml;ttcher

Johann-Peter Melder

Wolfgang Siegel

Gerd Kaibel

Andreas Kramer

Boris Breitscheidel

Stefan Rittinger

Arthur H&ouml;hn

Melanie Brunner

Willi Schmidt

Franz Josef Br&ouml;cker

Hans-J&uuml;rgen Weyer

Mark Wehinger

Aurelie Alemany

G&uuml;nter Riewe

Process for fractionating water-containing crude amine mixtures from amine synthesis

A process for hydrogenating an unsaturated heterocyclic compound or a mixture of two or more thereof by contacting the unsaturated heterocyclic compounder the mixture of two or more thereof with a hydrogen-containing gas in the presence of a catalyst comprising as active metal at least one metal from transition group VIII of the Periodic Table, applied to a support, wherein the support has macropores.

Method for hydrogenating unsaturated heterocyclic compounds

Process for preparing essentially formic acid-free N-alkyl-N&prime;-methylalkyleneureas

In a process for the suspension hydrogenation of an anthraquinone compound or a mixture of two or more thereof in a reactor in which there are present the working solution in which at least one catalyst is suspended and, in addition, a hydrogen-containing gas phase, the working solution and the gas phase are, in the reactor, passed at least partly through a fitting having openings or channels whose hydraulic diameter is from 0.5 to 20 mm, preferably from 1 to 10 mm, particularly preferably from 1 to 3 mm.

Method for suspension hydrogenation of an anthraquinone compound in a special reactor in order to produce hydrogen peroxide

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

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

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

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

Growing community of inventors

Hochdorf-Assenheim, Germany

Heinz Rütter

Growing community of inventors

Hochdorf-Assenheim, Germany

Heinz R&uuml;tter

Heinz Rütter