Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1985-11-14
1987-09-29
Phynes, Lucille M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528212, 528215, 528216, C08G 6538
Patent
active
046969969
ABSTRACT:
Polyphenylene ethers are prepared from monohydric phenols, which possess alkyl substituents in the two ortho-positions and, if desired, in the meta-position, but not in the para-position, by an oxidative coupling reaction with oxygen at from 15.degree. to 50.degree. C. and under from 1 to 10 bar in the presence of a catalyst complex, of a solvent and, if required, of an activator, by a method in which the conversion of the phenols is carried out in two more reaction zones, in which some or all of the solvent, the catalyst complex and the phenols and, where relevant, the activator is initially taken and is circulated by means of a conveying unit, and about 60-100% of the stoichiometric amount of oxygen required for the oxidative coupling is introduced into the first reaction zone and from 0 to about 40% of the said stoichiometric amount is introduced into the second reaction zone.
REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3306875 (1967-02-01), Hay
patent: 4477649 (1984-10-01), Mobley
patent: 4556699 (1985-12-01), Bialy et al.
patent: 4578449 (1986-03-01), Mobley
patent: 4607085 (1986-08-01), Penczek et al.
Brandt Hermann
Dreher Hermann
Echte Adolf
Fischer Hermann
Gausepohl Hermann
BASF - Aktiengesellschaft
Phynes Lucille M.
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