Method for making aromatic bis(ether anhydrides)

Details Method for making aromatic bis(ether anhydrides) Method for making aromatic bis(ether anhydrides)

1981-04-13

1982-07-20

Jiles, Henry R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30789

Patent

active

043405452

ABSTRACT:
A method is provided for making aromatic bis(ether phthalic anhydride)s by effecting an imide-anhydride exchange between aromatic bis(ether N-organophthalimide) and phthalic anhydride in the presence of an imide anhydride exchange catalyst and water and extracting the aqueous imide-anhydride exchange reaction mixture with an inert organic solvent. Imide-anhydride exchange product having at least 97 mole percent aromatic bis(ether phthalic anhydride) can be made at substantially reduced temperatures and pressures, by increasing by a factor of at least two, the number of times the imide-anhydride exchange mixture is extracted.

REFERENCES:
patent: 4116980 (1978-09-01), Webb
patent: 4128574 (1978-12-01), Markezich et al.
Weissberger, Technique of Organic Chem., vol. III, Part I: Separation Purification; Interscience Publishers, (1956), pp. 149-157, 164 and 313.

Affiliated with

Also associated with

Rating

Method for making aromatic bis(ether anhydrides) does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for making aromatic bis(ether anhydrides), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making aromatic bis(ether anhydrides) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-249824