Process for manufacturing terephthalic acid
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United States of America Patent
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Jun 13, 2000
Grant Date -
N/A
app pub date -
Jun 29, 1998
filing date -
Dec 30, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a process for manufacturing terephthalic acid and more particularly, to a process for manufacturing terephthalic acid in a high recovery rate with high purity in accordance with the practice of this invention comprising the following procedures: polyethylene terephthalate (hereinafter referred to as 'PET') scrap is hydrolyzed with alkaline aqueous solution to give the slurry of terephthalic acid alkali metal/earth metal salt, then the particles of terephthalic acid formed from acid-neutralization are enlarged to recover terephthalic acid with high purity.
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