Method for the purification of dioxydiphthalic anhydride and est

Details Method for the purification of dioxydiphthalic anhydride and est Method for the purification of dioxydiphthalic anhydride and est

1995-03-31

1996-04-30

Dentz, Bernard

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549359, C07D49314, C07D31924

Patent

active

055126863

ABSTRACT:
Crude mixtures of dioxydiphthalic anhydride containing alkali metal salts are purified by treating the crude mixture with an alkanol, such as n-butanol, to form the dioxydiphthalic acid diester; removing the insoluble alkali metal salts by filtration; removing the excess alkanol; and reconverting the dioxydiphthalic acid diester to dioxydiphthalic anhydride.

REFERENCES:
patent: 3356691 (1967-12-01), Gaertner
patent: 5003086 (1991-03-01), Stults et al.
patent: 5089631 (1992-02-01), Stults et al.
patent: 5166404 (1992-11-01), Stults et al.
Schwartz et. al., High Performance Polymers, vol. 6, No. 2, pp. 155-163 (1994).
Indian Journal of Chemistry, Govindachari et al, vol. 5, Mar. 1967.

Affiliated with

Also associated with

Rating

Method for the purification of dioxydiphthalic anhydride and est 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 the purification of dioxydiphthalic anhydride and est, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the purification of dioxydiphthalic anhydride and est will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-629964