Polycarboxylic acid production system employing hot liquor...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Reexamination Certificate

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C562S420000

Reexamination Certificate

active

11365258

ABSTRACT:
Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes an optimized post-digestion cooling stage that provides a TPA product having enhanced purity, while minimizing costs associated with removing impurities from recycled solvent.

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