Removal of the catalyst from polyphenylene ethers

Details Removal of the catalyst from polyphenylene ethers Removal of the catalyst from polyphenylene ethers

1983-07-21

1984-07-17

Lee, Lester L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528212, 528482, 528486, 528488, 528492, 528494, 528495, 528496, 528499, C08G 6544

Patent

active

044607644

ABSTRACT:
In the preparation of a high molecular weight polyphenylene ether from a monohydric phenol by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a metal salt and an organic amine and in the presence of a solvent, and isolation of the metal ion component of the catalyst from the polyphenylene ether solution by means of a complex-forming or chelate-forming compound, the catalyst is removed by a method wherein complex formation and isolation of the metal ion component of the catalyst are carried out in an aqueous medium in the presence of from 0.1 to 5,000 mg of an anionic or non-ionic surfactant.

REFERENCES:
patent: 3838102 (1974-09-01), Bennett et al.
patent: 3951917 (1976-04-01), Floryan et al.
patent: 3984374 (1976-10-01), Cooper et al.
patent: 3994859 (1976-11-01), Floryan et al.
patent: 4070383 (1978-01-01), Rutledge
patent: 4097458 (1978-06-01), Bennett et al.
patent: 4237265 (1980-12-01), Eliassen et al.
patent: 4263426 (1981-04-01), Cooper et al.

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