Process for the production of a polyphenylene ether protected from molecular weight degradation
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United States of America Patent
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May 24, 1988
Grant Date -
N/A
app pub date -
May 13, 1985
filing date -
May 25, 1984
priority date (Note) -
Expired
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Abstract
A process for the production of a polyphenylene ether by quenching a transition metal catalyzed oxidative coupling reaction of a di-ortho-substituted phenol, and separation of the metal component. The process comprises: (1) removing the oxygen required for the coupling reaction, (2) contacting the reaction solution with hydrogen sulfide, a solution containing sulfide ions or a mixture thereof, and (3) separating the resulting precipitate.
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