A process for preparing 2,6-naphthalenedicarboxylic acid comprising oxidation reaction of 2,6-diisopropylnaphthalene or an oxidation product thereof with molecular oxygen in a solvent containing an aliphatic carboxylic acid in the presence of a catalyst comprising cobalt and manganese as heavy metals and a bromine compound is disclosed, in which said oxidation reaction is carried out in the presence of at least one nitrogen-containing compound selected from the group consisting of a pyridine compound, ammonia, a carboxylic acid ammonium salt, urea, a urea derivative, an amine, and a carboxylic acid amide. 2,6-Naphthalenedicarboxylic acid can be obtained at higher purity and in increased yield.
本发明公开了一种制备 2,6-
萘二
甲酸的工艺,该工艺包括
2,6-二异丙基萘或其氧化产物在含有脂肪族
羧酸的溶剂中与分子氧在由重
金属
钴和
锰以及
溴化合物组成的催化剂存在下进行的氧化反应、其中所述氧化反应是在至少一种选自
吡啶化合物、
氨、
羧酸铵盐、
脲、
脲衍
生物、胺和
羧酸酰胺的
含氮化合物存在下进行的。2,6-
萘二
甲酸的纯度更高,产率更高。