Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 17, 2009
Patent Application Number
11638917
Date Filed
December 14, 2006
Patent Primary Examiner
Patent abstract
This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by product resulting from the process is condensed in a condenser, and a portion of the condensed by-product is recycled to the condenser while anther portion is recycled back into the process.
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