Two-stage continuous process for preparation of polyphenylene ox

Details Two-stage continuous process for preparation of polyphenylene ox Two-stage continuous process for preparation of polyphenylene ox

1983-03-25

1984-10-16

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, 528214, 528215, 528216, 528217, C08G 6544

Patent

active

044776497

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.

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

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