Process for preparing 4,4'-dihydroxybiphenyl.

摘要

A process for preparing 4,4'-dihydroxybiphenyl is disclosed, which comprises debutylation of 3,3',5,5'-tetra-t-butyl-4,4'-dihydroxybiphenyl in an organic solvent in the presence of an acid catalyst, wherein said debutylation is carried out in the presence of water and/or a lower alcohol. The desired product can be obtained at a high purity in a high yield.