Basf Se Corporation

Basf Aktiengesellschaft

Basf Akteingesellschaft

Stefan Käshammer

Rolf Pinkos

Martin Haubner

Stephan Schlitter

Tobias Wabnitz

Michael Hesse

Christoph Sigwart

Stephan Hatscher

Klaus-Peter Pfaff

Achim Gerstlauer

Ulrich Steinbrenner

Till Gerlach

Michael Henningsen

Jochen Steiner

Regina Vogelsang

Volkmar Menger

Axel Paul

Wolfgang Staffel

Peter Groll

Thomas Domschke

Roland Kessinger

Lothar Rüb

Lembit Tuttelberg

Michael Hüllmann

Andreas Kusche

The present invention provides a process for changing the given mean molecular weight Min the continuous preparation of polytetrahydrofuran or tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of a telogen and/or of a comonomer over an acidic catalyst, wherein

[object Object]

The present invention relates to a process for preparing polytetrahydrofuran or tetrahydrofuran copolymers by polymerization of tetrahydrofuran in the presence of a telogen and/or a comonomer over a fixed bed of an acid catalyst, in which the temperature of the polymerization mixture increases in the direction of flow through the catalyst bed.

Method for the production of polytetrahydrofurane or tetrahydrofurane copolymers

The present invention provides a catalyst comprising a mixture of at least one acid-activated sheet silicate with a transition metal oxide of groups 8 and/or 9 of the Periodic Table of the Elements and also a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers, in which tetrahydrofuran is polymerized in the presence of at least one telogen and/or comonomer over such a catalyst.

Catalyst and process for the polymerization of cyclic ethers

The present invention relates to a solid, acid catalyst for the preparation of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which has a BET surface area of at least 160 m/g and an acid center density of at least 0.05 mmol/g for pKvalues of from 1 to 6, to a process for preparing it and to a process for the polymerization of cyclic ethers over this catalyst.

Catalyst, its preparation and the polymerization of cyclic ethers over this catalyst

The present invention provides a process for preparing mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of at least one telogen and/or of a comonomer over an acidic catalyst, wherein the polymerization reactor is started up using a mixture of polytetrahydrofuran, the mono- or diesters of polytetrahydrofuran and/or of the THF copolymers, tetrahydrofuran, any comonomer and at least one carboxylic acid and/or one carboxylic anhydride.

Method for producing monoesters and diesters of polytetrahydrofuran and of tetrahydrofuran copolymers

The present invention relates to a process for the preparation of N-substituted 2,6-dialkylmorpholines of the formula I in which Rand R, independently of one another, are hydrogen, alkyl or cycloalkyl, or Rand Rtogether with the carbon atom to which they are bonded are a 5- to 14-membered carbocycle, and Rand R, independently of one another, are alkyl or cycloalkyl, by reacting at least one carbonyl compound of the formula II in which Rand Rhave the meanings given above, with at least one morpholine of the formula III in which Rand Rhave the meanings given above, in the presence of hydrogen and at least one metal-containing catalyst, wherein the active component of the catalyst consists essentially of platinum group metals.

Method of producing N-substituted 2,6-dialkylmorpholines

The invention relates to a process for the continuous preparation of THF by reaction of a 1,4-butanediol-containing reaction mixture over a heteropolyacid catalyst which has not been predried, wherein the reaction mixture comprises 2-(4-hydroxybutoxy)tetrahydrofuran.

Method for producing tetrahydrofuran

In a process for the single-stage preparation of polytetrahydrofuran and/or tetrahydrofuran copolymers having a mean molecular weight of from 650 to 5000 dalton by polymerization of tetrahydrofuran over an acid catalyst in the presence of at least one telogen and/or comonomer, the telogen and/or comonomer is added at at least two addition points in different segments of the polymerization apparatus.

Method for producing polytetrahydrofuran

Growing community of inventors

Schifferstadt, Germany

Stefan Käshammer