| http://www.w3.org/ns/prov#value | - The purification of CTA to produce purified terephthalic acid (PTA) increases the manufacturing cost of the PTA. It is desirable to maximize the concentration of by-products, impurities, and other compounds in the terephthalic acid to the extent that the terephthalic acid remains useful, especially in making poly(ethylene terephthalate) (PET) polymer and articles therefrom, such as, film, containe
|
