Process for the preparation of halophthalic anhydrides

Details Process for the preparation of halophthalic anhydrides Process for the preparation of halophthalic anhydrides

1991-08-29

1993-04-27

Page, Thurman K.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549247, 558415, 562849, 562853, 562855, C07D30774

Patent

active

052063917

ABSTRACT:
A process for the preparation of a halophthalic anhydride, such as chlorophthalic anhydride, comprising the liquid phase reaction of bromine with a halogen substituted hexa- or tetra-hydrophthalic anhydride to produce halophthalic anhydride and gaseous HBr, and reacting the gaseous HBr with chlorine to regenerate bromine.

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