Removal of catalyst from polyphenylene oxide reaction mixtures w

Details Removal of catalyst from polyphenylene oxide reaction mixtures w Removal of catalyst from polyphenylene oxide reaction mixtures w

1975-12-08

1977-08-02

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6544, C08G 6546

Patent

active

040395103

ABSTRACT:
A novel process is disclosed for the removal of catalyst residues from organic solutions of polyphenylene oxides. The process comprises adding a nitrogenous salt of nitrilotriacetic acid to a polyphenylene oxide reaction mixture and thereafter adding an antisolvent for polyphenylene oxide to the mixture to cause the polyphenylene oxide to precipitate.

REFERENCES:
patent: 3365422 (1968-01-01), Van Dort
patent: 3544515 (1970-12-01), Katchman et al.
patent: 3733301 (1973-05-01), Modan
patent: 3783147 (1974-11-01), Calicchia et al.
patent: 3838102 (1974-09-01), Bennett et al.
patent: 3951917 (1976-04-01), Floryan et al.

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