Method and apparatus for preparing purified terephthalic acid an

Details Method and apparatus for preparing purified terephthalic acid an Method and apparatus for preparing purified terephthalic acid an

1998-06-16

2000-04-25

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562485, 562414, C07C 51487

Patent

active

060546107

ABSTRACT:
A method and apparatus for preparing purified terephthalic acid and, optionally, isophthalic acid from mixed xylenes. The method of the present invention purifies the oxidation reactor effluent containing a mixture of terephthalic acid and isophthalic acid as well as minor amounts of 4-carboxybenzaldehyde (4-CBA), 3-carboxybenzaldehyde (3-CBA), and toluic acid isomers, to produce purified terephthalic acid and, optionally, purified isophthalic acid in an integrated process.

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