Process for the production of trimellitic anhydride with superio

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

1990-01-10

1991-04-23

Shen, Cecilia

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

050102079

ABSTRACT:
A process for the production of trimellitic anhydride with improved color properties disclosed. This process comprises treating trimellitic anhydride with an activated silicon compound followed by fractionation and at temperatures of about 200.degree. to about 300.degree. C. and a decreasing pressure of about 1 to about 25 mm Hg. Trimellitic anhydride is used in the manufacture of polyesters and polyamides-imides.

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patent: 4587350 (1986-05-01), Kilner et al.
patent: 4788296 (1988-11-01), Robbins et al.
patent: 4797497 (1989-01-01), Schammel
Hayakawa et al., Chem. Abst. 72-132321b, (1970).

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