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AssigneeBASF SE
InventorsKarsten Eller, Christoph Sigwart, Rainer Becker, Klaus-Dieter Plitzko, Rolf Fischer, Frank Stein, Ulrich Müller, Michael Hesse
Estimating the term…
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° C. and 1000° 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.
A process for the preparation of polytetrahydrofuran, tetrahydrofuran copolymers, and diesters or monoesters of these polymers by the polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer over a heterogeneous supported catalyst which contains an active component comprising a catalytically active amount of at least one oxygen-containing tungsten and/or molybdenum compound and a promoter comprising at least one element of Group 2, 3 (including the lanthanides), 5, 6, 7 8 or 14 of the Periodic Table, or a compound of such elements on an oxidic support material and which, following application of the precursor compounds of the active component and promoter to the support material precursor, has been calcined at temperatures of from 500° C. to 1000° C.
Dependencies are inferred from the claim text.