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    • 10. 发明申请
    • Process for producing 1,3-naphthalenedicarboxylic acid
    • 1,3-萘二甲酸的制备方法
    • US20050187403A1
    • 2005-08-25
    • US11063970
    • 2005-02-24
    • Hiroshi OgawaJunya NishiuchiMitsuharu KitamuraKinji Kato
    • Hiroshi OgawaJunya NishiuchiMitsuharu KitamuraKinji Kato
    • C07C51/255C07C51/265C07C63/38
    • C07C51/265C07C63/38
    • 1,3-Naphthalenedicarboxylic acid is produced by oxidizing 1,3-dialkylnaphthalene in a liquid-phase with an oxygen-containing gas in the presence of a C2-C6 lower aliphatic carboxylic acid solvent and a catalyst comprising a heavy metal and a bromine compound. By regulating the ratio of the total number of bromine atoms fed into a reaction system to the total number of 1,3-dialkylnaphthalene molecules fed into the reaction system within a specific range, 1,3-naphthalenedicarboxylic acid is efficiently produced with low costs. Using 1,3-dimethylnaphthalene, as the starting 1,3-dialkylnaphthalene, which is produced by isomerizing dimethylnaphthalenes in a liquid phase in the presence of a catalyst comprising hydrogen fluoride and boron trifluoride together with a C5-C10 alicyclic saturated hydrocarbon having a five-membered or six-membered ring structure, a highly pure 1,3-naphthalenedicarboxylic acid is efficiently produced.
    • 1,3-二萘基二羧酸是通过在C 2 -C 6 -C 6的存在下用含氧气体在液相中氧化1,3-二烷基萘而制备的, 低级脂族羧酸溶剂和包含重金属和溴化合物的催化剂。 通过调节进料到反应体系中的溴原子总量与进料到反应体系中的1,3-二烷基萘分子的总数在特定范围内的比例,可以低成本有效地制备1,3-萘二羧酸。 使用1,3-二甲基萘作为起始1,3-二烷基萘,其通过在包含氟化氢和三氟化硼的催化剂存在下在液相中异构化二甲基萘一起制备,与C 5 N 5 具有5元或6元环结构的-C 10脂肪族饱和烃,高纯度的1,3-萘二羧酸。