Preparation of bisphenol-formaldehyde ethers using nitric acid

Details Preparation of bisphenol-formaldehyde ethers using nitric acid Preparation of bisphenol-formaldehyde ethers using nitric acid

1980-01-03

1981-04-07

Schain, Howard E.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

204 14R, 204181C, 260 293, 525504, 528147, 528153, 568608, 568609, C08G 234

Patent

active

042607302

ABSTRACT:
A bisphenol is reacted with formaldehyde in solution in alcohol in the presence of an alkali metal hydroxide, preferably at a pH of from 7-10, to provide a polymethylol derivative. Nitric acid is then added to precipitate the hydroxide and an excess is preferably used to provide an acid pH, preferably pH 1-3, and the acidic mixture is heat reacted to remove water of etherification. The nitric acid catalyst is then precipitated with alkali metal hydroxide to enable easy removal of both acid and alkali as an insoluble salt.

REFERENCES:
patent: 3220964 (1965-11-01), Giller
patent: 4182732 (1980-01-01), Fry
Chem. Abstracts, vol. 63, 1965, 18397f-g, Taniewski et al.
Chem. Abstracts, vol. 59, 1963, 14200f-g, Okamura et al.
Chem. Abstracts, vol. 84, 1976, 107172u, Hitachi Co.
Chem. Abstracts, vol. 34, 1940, 3402.sup.9 -3403.sup.1, Albert.

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