Liquid phthalic anhydride recovery process

Details Liquid phthalic anhydride recovery process Liquid phthalic anhydride recovery process

1994-05-12

1996-04-16

Dentz, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549250, C07D30789

Patent

active

055084435

ABSTRACT:
A process for separating phthalic anhydride from a vapor phase oxidation product by mixing and cooling the vapor phase oxidation product with recycled by-products which have freezing points lower than the freezing point of pure phthalic anhydride, thereby condensing and recovering a liquid phase phthalic anhydride product without the formation of an intermediate solid phase.

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