Method of decolorizing mixtures of t-butyl alkylphenols

Details Method of decolorizing mixtures of t-butyl alkylphenols Method of decolorizing mixtures of t-butyl alkylphenols

1981-01-30

1982-06-29

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568749, 568788, 568793, C07C 3768, C07C 3904

Patent

active

043373690

ABSTRACT:
A method of eliminating color-causing impurities in mixtures of t-butylalkyl phenols by treatment with trioxane at 100.degree. C. and 1 atmospheric pressure is described. These phenols are used as peroxide inhibitors in polyol formulations for polyurethane foams. Discoloration of the polyol occurs if the phenol mixture is not treated with trioxane. It is an essential part of the invention that the t-butyl alkylphenol mixture be derived from an alkylphenol made over an acid resin catalyst. Mixtures made by a BF.sub.3 process may not be decolorized by this method. Generally, the color decreases with increasing amounts of trioxane.

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Abram, J. C. et al., "Mechanism of color removal by ion exchange resins," Sucr. Belge/Sugar Ind. Abstr., vol. 90, No. 11, 1971, pp. 525-532.
Urban, M. et al., "Hydrazine Hydrate as Antioxidant Additive for Monohydric Phenols," Sb. Pr. Vyzk. Chem. Vyuziti Uhli, Dehtu Ropy, No. 10, 1970, pp. 65-78.

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