| http://www.w3.org/ns/prov#value | - In general, the crude aromatic polycarboxylic acid can be obtained by oxidation of, as the raw material, a derivative of the aromatic hydrocarbon described above which is substituted with a polyfunctional groups giving carboxyl groups by oxidization, for example, an alkyl group such as methyl group, ethyl group and isopropyl group, formyl group and acetyl group.
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