CATALYST AND METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURAN

摘要

The invention relates to a catalyst for the production of polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of said polymers by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer, wherein said catalyst is present in the form of catalyst molded bodies or catalyst particles with a volume of the individual molded bodies or particles of at least 0.05mm<3>, preferably at least 0.2mm<3>, more particularly 1mm<3>. Said catalyst has at least one of characteristics a) and b): a) pore radius distribution with at least a maximum pore distribution in the range of 100-5000 A pore radius, b) pore volume of catalyst pores with radii of 200 - 3000 A bigger than 0.05cm<3>/g and/or radii of 200 - 5000 A bigger than 0.075cm<3>/g and/or a radius of > 200 A bigger than 0.1cm<3>/g.