| 摘要 |
PURPOSE: A manufacturing method of aromatic dicarboxylic acids is provided to remarkably reduce the content of impurity including an action intermediate, thereby obtaining high yield and improved quality. CONSTITUTION: A manufacturing method of aromatic dicarboxylic acids comprises: an oxidation step obtaining crude aromatic dicarboxylic acids containing aromatic dicarboxylic acid and an intermediate by oxidizing an aromatic raw compound under the presence of a reaction accelerator of peroxide and a reaction catalyst; a solid-liquid separation step obtaining crude aromatic dicarboxylic acidic cake by coagulation separating the crude carboxylic acids with mother liquid; and additionally s purification step converting the crude aromatic dicarboxylic acidic cake to aromatic dicarboxylic acids by oxidation-reduction reacting with oxygen supply source. |
