| 摘要 |
<p>Provided is a method for manufacturing 4,4'-oxydiphthalic acid with favorable productivity and high-yield via 4,4'-oxydiphthalonitrile, using 4-nitrophthalonitrile as a reaction raw material; the method including a hydrolysis step for hydrolyzing the 4,4'-oxydiphthalonitrile under acidic conditions, the hydrolysis being achieved by heating the 4,4'-oxydiphthalonitrile in the presence of an aliphatic carboxylic acid, an inorganic acid, and water. 4,4'-oxydiphthalonitrile obtained by heating 4-nitrophthalonitrile in a solvent in the presence of an alkali metal salt is preferably provided for hydrolysis.</p> |
