PROCESS FOR PRODUCING AROMATIC OR AROMATIC BIS (AROMATIC ETHER-ANHYDRIDE) BIS (ARTHAMIC ETHER ACID) BY EXCHANGE REACTION WITH ACID OR PHTHALIC ANHYDRIDE

摘要

P METHOD FOR OPTIMALLY CONVERTING BISIMIDE DEPARTURE. / P P IT CONSISTS IN HEATING A MIXTURE COMPRISING A BIS (ETHER-PHTALIMIDE), ANHYDRIDE OR PHTHALIC ACID, A CATALYST OF EXCHANGE, WATER AND AN INERT WATER-IMMERSIBLE ORGANIC SOLVENT TO PRODUCE A BALANCED BIPHASE LIQUID REACTION MIXTURE. / P P APPLICATION TO THE CONTINUOUS MANUFACTURE OF BIS (ETHER-ANHYDRIDE). / P