| 摘要 |
PURPOSE:To obtain the titled compound useful as an intermediate for various syntheses, in high yield, by oxidizing 2,3-dimethyl-naphthalene with O2 in the presence of a catalyst containing Co, Ce and Br, using a decreased amount of solvent, under a pressure to bring little dander of forming an explosive mixture. CONSTITUTION:2,3-Naphthalenedicarboxylic acid is produced by the oxidation of 2,3-dimethylnaphthalene with molecular oxygen in liquid phase (preferably in acetic acid) in the presence of a catalyst containing cobalt, cerium and bromine as essential elements (preferably the concentrations of Co, Ce and Br in the reaction solvent are 100-10,000ppm) and especially having a Ce/Co atomic ratio of <=1.5. The reaction can be carried out under a reaction pressure of between normal pressure and about 30kg/cm<2> which causes little danger of forming an explosive mixture, by the use of the catalyst. USE:Intermediate for dyes, organic pigments, etc. |
