Process for producing benzophenone tetracarboxylic dianhydride

Details Process for producing benzophenone tetracarboxylic dianhydride Process for producing benzophenone tetracarboxylic dianhydride

1986-04-22

1987-08-04

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

046847383

ABSTRACT:
A process for producing benzophenone tetracarboxylic dianhydride, which comprises adding benzophenone tetracarboxylic acid to a solvent comprising, as the main constituent, an organic compound having a boiling point of more than 100.degree. C. and being inert to benzophenone tetracarboxylic acid and benzophenone tetracarboxylic anhydrides, and heating the resulting mixture. This process enables one to produce benzophenone tetracarboxylic dianhydride having a very low moisture absorbency.

REFERENCES:
patent: 3850967 (1974-11-01), Suatoni et al.
Zh Org. Khim 4(1) 163-168 (1968).
Chemical Abstract, vol. 68, p. 8374, 1968.
Chemical Abstract, vol. 80, 1974.
Chemical Abstract, vol. 66, p. 7183, 1967.

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