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

2007-03-27

2007-03-27

Oh, Taylor Victor (Department: 1625)

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

Organic compounds

Carboxylic acids and salts thereof

C562S485000, C562S487000, C562S417000, C562S416000, C562S077000

Reexamination Certificate

active

10161571

ABSTRACT:
Disclosed is a process for the production of terephthalic acid by a plurality of process steps including the catalyst oxidation of a dialkylbenzene compound, a second oxidation, a hydrogenation of the product of the second oxidation, and crystallization of the hydrogenation terephthalic acid using a plurality of series-connected crystallizers.

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USPTO Office Action dated Jul. 13, 2005 for U.S. Appl. No. 10/423,389.
USPTO Office Action dated Feb. 7, 2005 for U.S. Appl. No. 10/423,389.
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