Fiber-grade terephthalic acid recovered from the effluent from paraxylene oxidation in acetic acid and the catalytic hydrogenation of the oxidation effluent in the presence of metallic platinum family metals
Fiber-grade quality terephthalic acid can be obtained by dissolving partially purified terephthalic acid: the product separated from catalyst components and impurities in acetic acid solvent portion of oxidation effluent, acetic acid washed and dried: either in deionized water or acetic acid at temp...
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