PURIFICATION OF p-AMINOPHENOL

摘要

A process is provided for obtaining purified p-aminophenol. The process comprises bringing an aromatic amine from the group of aniline, toluidines, xylidines and mixtures thereof into contact with crude p-aminophenol containing impurities and recovering the purified p-aminophenol. In a particularly important aspect the aromatic amine is brought into contact with an aqueous acid reaction medium containing p-aminophenol and impurities; the pH of the medium is adjusted to above 6 and preferably from about 6.5 to 7.5; the medium is cooled and the purified crystalline p-aminophenol is removed.