Process for the production of purified terephthalic acid

Details Process for the production of purified terephthalic acid Process for the production of purified terephthalic acid

1996-06-24

1997-12-16

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562414, C07C 5143

Patent

active

056987340

ABSTRACT:
Purified terephthalic acid is prepared by a process of subjecting an aqueous solution of crude terephthalic acid to hydrogenation to reduce impurities, crystallizing this solution to produce a slurry of purified terephthalic acid in an aqueous liquor, and carrying out an integrated separation washing process using a centrifuge having washing facilities.

REFERENCES:
patent: 5583254 (1996-12-01), Turner et al.

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