Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2007-05-08
2007-05-08
Cain, Edward J. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S048000
Reexamination Certificate
active
10788622
ABSTRACT:
A process for removing contaminants from PET components by mixing ethanediol with the PET feedstock at a temperature about the boiling point of ethanediol and for a time sufficient to convert the polyethylene terephthate components to polyethylene terephthate polymers which are soluble in the ethanediol and form bis(hydroxyethyl)terephthalate and produce a product mixture thereof containing insoluble materials. The soluble polyethylene terephthate polymers, bis(hydroxyethyl)terephthalate and ethanediol are recovered from the product mixture.
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Cain Edward J.
Petrecycle Ltd.
Reed Smith LLP
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