反应详情

A portion (10.0 g) of this reaction solution was used in the subsequent process. Phenol (20 g) and sulfuric acid (0.04 g) were added to 10.0 g of reaction solution (1) not only for neutralizing the base in the reaction system but also to render the reaction solution acidic (pH, 1). Thereafter, the following two reactions were performed in one step at 180° C. over a period of 6 hours: a redox reaction in which the unreacted 2,6-di-t-butylphenol and 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone were reacted to produce 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl; and a reaction in which 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl was dealkylated into p,p'-biphenol.

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