Process for the oxidative purification of terephthalic acid

Details Process for the oxidative purification of terephthalic acid Process for the oxidative purification of terephthalic acid

2006-07-11

2006-07-11

Tsang, Cecilia J. (Department: 1625)

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

Organic compounds

Carboxylic acids and salts thereof

C562S418000, C562S487000, C562S606000

Reexamination Certificate

active

07074954

ABSTRACT:
Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The process produces purified carboxylic acid slurry having good color and low impurity levels without the use of purification steps like hydrogenation or an impurity removal process.

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