Patent ID: 6211401
Filing Date: 2001-04-03
Classification: B01J,C08G

Abstract:
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.degree. C. to 1000.degree. C.