Method for making aromatic bis(ether anhydride)

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

1985-02-14

1986-02-18

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548454, C07D30789

Patent

active

045714258

ABSTRACT:
A method is provided for making aromatic bis(ether anhydrides) by effecting an exchange reaction between aromatic bis(ether imide) and phthalic anhydride in the presence of water and an exchange catalyst. The separation and recovery of phthalimide and aromatic bis(ether anhydride) is achieved in a stripper-reactor using a vaporous mixture of water and the exchange catalyst.

REFERENCES:
patent: 3879428 (1975-04-01), Heath et al.
patent: 4116980 (1978-09-01), Webb
patent: 4340545 (1982-07-01), Webb et al.
Distillation with Chemical Reaction Studies in a Six-tray Sieve Column, Jeffreys et al., Chimie et Industrie-Genie Chimique, vol. 101, No. 8, 4/69, pp. 1111-1117.
Countercurrent Equilibrium Stage Separation with Reaction, Nelson, AlChE Journal, vol. 17, No. 5, 9/71, pp. 1043-1049.

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