Water → 4,4'-Dihydroxybiphenyl

Participants

Reaction Conditions

Reaction Steps

Dipotassium 4,4'-biphenyldisulfonate (195 g) was added to 448 g of a 50% aqueous solution of potassium hydroxide, and the mixture was stirred. Then, 1680 g of a hydrogenated triphenyl mixture was mixed. The mixture was heated to 310° C. in an atmosphere of nitrogen, and with stirring, it was dehydrated. Thereafter, the mixture was stirred at 310° C. for 3 hours. After cooling, 1 liter of water was added to the reaction mixture to separate the triphenyl hydrogenated layer. The water layer was decolorized with activated carbon, and precipitated with dilute sulfuric acid to give 88.9 g (yield 95.6%) of 4,4'-biphenol.

Provenance & Evidence