Method of preparation of pyrocatechol and hydroquinone by hydroxylation of phenol

摘要

P improved process for preparing the catechol and hydroquinone by hydroxylation of phenol. / p & & p & is reacted with a phenol at a temperature between - 10 and 80°C. a solution of a percarboxylic acid in an inert organic solvent which is practically free from moisture and of hydrogen peroxide. / p & & p & the process according to the invention gives the two desired diphenols, the industrial importance is well known, with excellent yields. / p