Two-stage process for preparation of polyphenylene oxides

Details Two-stage process for preparation of polyphenylene oxides Two-stage process for preparation of polyphenylene oxides

1985-02-26

1986-03-25

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 65, 526 66, 526 67, 528214, 528215, 528216, 528217, 528218, C08G 6544

Patent

active

045784493

ABSTRACT:
Polyphenylene oxides are prepared by the catalytic reaction of oxygen with a monohydroxyaromatic compound such as 2,6-xylenol in a solvent for reactants and product, in a two-stage process. The first stage is effected continuously in at least one and preferably not more than two back-mixed (e.g., tank) reactors, and the second stage in one or more batch reactors or, preferably, in a reaction system with limited back-mixing, typically a cylindrical reactor containing multiple agitated zones. In the case of a copper catalyst system, it is also preferred to pre-mix the non-gaseous constituents of the reaction mixture in an inert atmosphere.

REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3306875 (1967-02-01), Hay
patent: 3789054 (1974-01-01), Izawa et al.
patent: 3914266 (1975-10-01), Hay
patent: 3988297 (1976-10-01), Bennett et al.
patent: 4028341 (1977-06-01), Hay
patent: 4054553 (1977-10-01), Olander
patent: 4477649 (1984-10-01), Mobley

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