A process for producing tetrafluorophthalic acid is disclosed, which comprises the steps of:
(a) reacting an alkali metal fluoride and at least one imide compound represented by formula (I) or (II)
wherein X¹, X², X³, and X⁴, which may be the same or different, each represents a chloride atom or a bromide atom, R¹ represents a monovalent organic group, and R² represents a divalent organic group, to provide an N-substituted tetrafluorophthalimide; and
(b) hydrolyzing the tetrafluorophthalimide in the presence of an acid.
本发明公开了一种生产四
氟邻苯二甲酸的工艺,该工艺包括以下步骤:(a) 碱
金属
氟化物与至少一种由式(I)或(II)代表的
亚胺化合物反应,其中 X¹、X²、X³和 X⁴可以相同或不同,各自代表
氯原子或
溴原子,R¹代表一价有机基团,R²代表二价有机基团,以提供 N-取代的四
氟邻苯二甲
酰亚胺;以及(b) 在酸存在下
水解四
氟邻苯二甲
酰亚胺。