Process for preparing polyphenylene ethers
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United States of America Patent
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Jul 31, 1984
Grant Date -
N/A
app pub date -
Feb 15, 1983
filing date -
Feb 15, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved method for the production of polyphenylene ethers is disclosed. The method comprises oxidatively coupling monohydric phenols in the presence of a complex catalyst and in a liquid medium which is a solvent for the monomer and catalyst and a non-solvent for the polyphenylene ether. The polyphenylene ether precipitates to form a slurry of particulate solids which is then washed with an aqueous solution of a chelating agent to remove catalyst residue.
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