A process for producing tetrafluorophthalic anhydride, which comprises chlorinating tetrachlorophthalic anhydride to obtain 3,3,4,5,6,7-hexachloro-1-[3H]-isobenzofuranone, then fluorinating it to obtain 3,4,5,6-tetrafluorophthaloyldifluoride and/or 3,3,4,5,6,7-hexafluoro-1-[3H]-isobenzofuranone, and further reacting the tetrafluorophthalolyldifluoride and/or the hexafluoro-1-[3H]-isobenzofuranone with an inorganic base or an organic acid to obtain tetrafluorophthalic anhydride.
一种生产四
氟邻苯二酐的方法,包括
氯化四
氯邻苯二酐以得到3,3,4,5,6,7-六氯-1-[3H]-
异苯并呋喃酮,然后
氟化它以得到3,4,5,6-四
氟邻苯二酰二
氟化物和/或3,3,4,5,6,7-六
氟-1-[3H]-
异苯并呋喃酮,然后进一步将四
氟邻苯二酰二
氟化物和/或六
氟-1-[3H]-
异苯并呋喃酮与
无机碱或有机酸反应以得到四
氟邻苯二酐。