| http://www.w3.org/ns/prov#value | - The aromatic polycarboxylic acid obtained by the oxidation reaction contains impurities such as monocarboxylic acids and aldehydes which are intermediate products of the oxidation reaction, addition products of bromine and metal components which are derived from the catalyst, and coloring substances having unknown structures. [0004] When the aromatic polycarboxylic acid containing impurities is us
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