Use of a residual oligomer recyclate in the production of macrocyclic polyester oligomer
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United States of America Patent
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Jul 6, 2010
Grant Date -
Oct 19, 2006
app pub date -
Mar 24, 2006
filing date -
Sep 1, 2000
priority date (Note) -
Expired
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Abstract
The invention relates to methods and systems for the use of an oligomer recyclate from a depolymerization product stream. The oligomer byproduct of a polyester depolymerization reaction can be used as a reactant in the formation of a polyester. For example, linear oligomer byproduct can be used as a reactant in a solution polymerization to form a low-acid polyalkylene terephthalate.
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