Process for the preparation and recovery of oxdiphthalic anhydri

Details Process for the preparation and recovery of oxdiphthalic anhydri Process for the preparation and recovery of oxdiphthalic anhydri

1988-02-24

1989-09-26

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

048701947

ABSTRACT:
Oxydiphthalic anhydrides of the formula ##STR1## are prepared by reacting a halophthalic anhydride with potassium carbonate in:

REFERENCES:
patent: 4499285 (1985-02-01), Evans
patent: 4625037 (1986-11-01), Evans
patent: 4697023 (1987-09-01), Schwartz et al.

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