申请人:ASAHI GLASS COMPANY LTD.
公开号:EP0669310A1
公开(公告)日:1995-08-30
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甲酸酐的工艺,包括将四氯邻苯二甲酸酐氯化以获得 3,3,4,5,6,7-六氯-1-[3H]-异苯并呋喃酮,然后将其氟化以获得 3,4,5,6-四氟邻苯二甲酸二氟化物和/或 3、3,4,5,6,7-六氟-1-[3H]-异苯并呋喃酮,再将四氟邻苯二氟化物和/或六氟-1-[3H]-异苯并呋喃酮与无机碱或有机酸反应,得到四氟邻苯二甲酸酐。