Process for preparing a mixture of recycled terephthalic acid and isophthalic acid
AssigneeRittec Umwelttechnik GmbH
InventorsLars BIERMANN, Esther BREPOHL, Carsten EICHERT, Clemens MÜLLER, Vitalij SALIKOV, Stephan SCHOLL
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Abstract
The invention relates to a method for producing a mixture of recycled terephthalic acid (r-TA) and recycled iso-terephthalic acid (r-IA) from condensation polymer waste (CP waste) to obtain a mixture of r-TA and r-IA having set r-IA isomer content between 0.001% by weight and 25% by weight of the mixture, for which waste having different IA contents is mixed and processed.
Claims11
A method for the production of a mixture of recycled terephthalic acid (r-TA) and recycled iso-terephthalic acid (r-IA) from condensation polymer waste (CP waste), comprising steps of:
- analyzing CP waste with regard to its IA content,
- dividing the CP waste into two or more fractions having different IA content, mixing the fractions to achieve a desired IA content in the mixture, and processing the mixture to obtain a mixture of r-TA and r-IA having adjusted r-IA isomer content between 0.001% by weight and 25% by weight of the mixture.
Dependencies are inferred from the claim text.