abstract |
The subject of the present invention is a catalyst comprising a mixture of at least one acid-activated layered silicate and an oxide of a group 8 and / or group 9 transition metal of the periodic table of elements, And a process for producing polytetrahydrofuran, polytetrahydrofuran-copolymer, diester or monoester of said polymer, characterized in that tetrahydrofuran is polymerized over such a catalyst in the presence of at least one telogen and / or comonomer. . |