Removal of bromine from phthalic anhydride

Details Removal of bromine from phthalic anhydride Removal of bromine from phthalic anhydride

1979-03-19

1980-04-08

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603464, C07D30789

Patent

active

041972473

ABSTRACT:
Bromine-substituted oxygen-containing impurities in phthalic anhydride which cannot be removed therefrom by distillation or a combination of heat treatment in the presence of a metal or a combination of catalytic hydrogenation and fractional distillation are removed by treating a mixture of vapors of such impure phthalic anhydride and water with a palladium catalyst prior to taking phthalic anhydride as a product fraction of fractional distillation.

REFERENCES:
patent: 2670325 (1954-02-01), West et al.

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