Method for reclaiming polyester or polyester mixtures

Details Method for reclaiming polyester or polyester mixtures Method for reclaiming polyester or polyester mixtures

2006-11-14

2006-11-14

Yoon, Tae H. (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

07135503

ABSTRACT:
The invention relates to a method for reclaiming polyesters or polyester mixtures from polyester or waste containing polyester. The aim of the invention is to reclaim polyesters or polyester mixtures of good quality in a cost-effective manner. To achieve this aim, the polyester and/or waste containing polyester is heated in a bath of dicarboxylic acid dialkyl ester to temperatures in excess of 150° C. In this process, polyester is dissolved in the dicarboxylic acid dialkyl ester or a dicarboxylic acid dialkyl ester mixture and subsequently extracted from the solution by means of solid-liquid separation.

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