| 摘要 |
<p>PURPOSE:To efficiently recover a heavy metal catalyst for oxidation from naphthalenedicarboxylic acid. CONSTITUTION:Naphthalenedicarboxylic acid contg. a heavy metal catalyst for oxidation obtd. by oxidizing a dialkylnaphthalene or an oxidized deriv. thereof with molecular oxygen is esterified by a reaction with alcohol and the heavy metal catalyst is separated and recovered by the washing with an acid component-contg. alcohol soln.</p> |
