Process for the production of trimellitic anhydride with improve

Details Process for the production of trimellitic anhydride with improve Process for the production of trimellitic anhydride with improve

1991-08-05

1992-06-23

Shah, Mukund J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

051244616

ABSTRACT:
A process for the production of trimellitic anhydride with improved color is disclosed. The process comprises heat treating trimellitic anhydride in the presence of oxides of boron or hydrated oxides of boron followed by fractionation. Trimellitic anhydride is used in the manufacture of polyesters and polyamide-imides.

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