Basf Aktiengesellschaft

Klaus-Dieter Plitzko

Rainer Becker

Christoph Sigwart

Rolf Hartmuth Fischer

Karsten Eller

Michael Hesse

Frank Stein

Gerd Heilen

Ulrich M&uuml;ller

Ulrich Mueller

Peter Groll

Christof Palm

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

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

Method for producing polytetrahydrofuran

Process for preparing polytetrahydrofuran and derivatives thereof

Method of producing polyoxytetramethylene glycol

Tetrahydrofuran/but-2-yne-1, 4-diol copolymers containing C-C triple

Preparation of polytetrahydrofuran

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Limburgerhof, Germany

Klaus-Dieter Plitzko