Patent ID: 7041752

Claim:
A 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 is in the form of shaped catalyst bodies or catalyst particles having a volume of the individual shape of the body or particle of at least 0.05 mm 3 and has both of the features a) and b): a) a pore radius distribution having at least one maximum in the pore radius range from 100 to 5000 Å, b) a pore volume of catalyst pores having radii of 200 to 3000 Å of greater than 0.05 cm 3 /g and/or a pore volume of pores having radii of 200 to 5000 Å of greater than 0.075 cm 3 /g and/or a pore volume of pores having radii >200 Å of greater than 0.1 cm 3 /g, and wherein the active catalyst composition is selected from among sheet silicates.