Process for manufacturing terephthalic acid
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United States of America Patent
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Oct 30, 2001
Grant Date -
N/A
app pub date -
Jun 29, 1998
filing date -
Dec 30, 1995
priority date (Note) -
Expired
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Abstract
This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing and recovering the highly purified terephthalic acid, in accordance with the practice of this invention comprising the following procedurses: alkali weight-reduction waste water discharged from weight-reduction process in a polyester textile dyeing complex is dissolved in water, adsorbed to remove impurities, and through acid-neutralization, terephthalic acid of this invention may be obtained.
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