Continuous method for making aromatic bis(ether phthalic...

Details Continuous method for making aromatic bis(ether phthalic... Continuous method for making aromatic bis(ether phthalic...

C - Chemistry, Metallurgy

07

C

260/509.7, 260/3

C07C 65/24 (2006.01) C07C 51/00 (2006.01) C07C 51/56 (2006.01) C07D 209/48 (2006.01) C07D 307/89 (2006.01)

Patent

CA 1173846

ABSTRACT OF THE DISCLOSURE A method is provided for continuously converting aromatic bis(ether N-organo substituted phthalimides) to aromatic bis(ether anhydrides) by heating a biphasic aqueous-organic mixture of aromatic bis(ether N-organo substituted phthalimide), phthalic acid and an exchange catalyst in a heated coiled tube reactor to produce an aqueous phase containing aromatic bis(ether phthalic acid) and an organic phase containing N-organo sub- stituted phthalimide which can then be separated and aromatic bis(ether phthalic anhydride) recovered from the aqueous phase.

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