US Patent 7528287 Preparation of poly(tetramethylene) glycol

Patent 7528287 was granted and assigned to E.I. Du Pont De Nemours And Company on May, 2009 by the United States Patent and Trademark Office.

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Date of Patent

May 5, 2009

Patent Application Number

11525331

Date Filed

September 22, 2006

Patent Primary Examiner

Patent abstract

This invention relates to a process comprising using ionic liquids for preparing poly(tetramethylene) glycol from tetrahydrofuran.

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