Two-stage continuous process for preparation of polyphenylene oxides
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United States of America Patent
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Oct 16, 1984
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N/A
app pub date -
Mar 25, 1983
filing date -
Mar 25, 1983
priority date (Note) -
Expired
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Abstract
Polyphenylene oxides are prepared by the catalytic reaction of oxygen with a monohydroxy aromatic compound such as 2,6-xylenol in a two-stage continuous process. The first stage is effected in at least one and preferably no more than two tank reactors, and the second stage in a reaction system with limited back-mixing, typically a cylindrical reactor containing multiple agitated zones. In a preferred embodiment of the invention, the non-gaseous constituents of the reaction mixture are pre-mixed in an inert atmosphere.
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