Catalyst, its preparation and the polymerization of cyclic...

Details Catalyst, its preparation and the polymerization of cyclic... Catalyst, its preparation and the polymerization of cyclic...

2003-09-12

2008-11-11

Wood, Elizabeth D (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Clay

C502S084000

Reexamination Certificate

active

07449422

ABSTRACT:
The present invention relates to a solid, acid 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 has a BET surface area of at least 160 m2/g and an acid center density of at least 0.05 mmol/g for pKavalues of from 1 to 6, to a process for preparing it and to a process for the polymerization of cyclic ethers over this catalyst.

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Blatterstrukturen, Klockmanns Mineralogie, Aug. 16, 1978, pp. 739-765.

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