Liquid extraction method for recovering aromatic bisimides

Details Liquid extraction method for recovering aromatic bisimides Liquid extraction method for recovering aromatic bisimides

1979-10-01

1981-01-27

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260326S, C07D20948

Patent

active

042474647

ABSTRACT:
A liquid extraction method is provided for recovering aromatic bisimides from an organic solvent aromatic bisimide reaction mixture having a variety of reaction by-products. An organic solvent solution of the bisimide reaction mixture is extracted with water and/or an aqueous alkali metal hydroxide to effect removal of such reaction by-products, and provide an organic solvent phase of the aromatic bisimide which can be obtained in substantially pure form upon removal of the organic solvent.

REFERENCES:
patent: 3852242 (1974-12-01), White
patent: 3957862 (1976-05-01), Heath et al.
patent: 4048190 (1977-09-01), Johnson et al.
patent: 4054577 (1977-10-01), Relles et al.
Grant, Hacklis Chem. Dictionary, McGraw-Hill, 1969, p. 640.
C. Starks, JACS 93:1 (1971), pp. 195-199.
D. Landini et al., Synthesis, 389, (1976).

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