Manufacturing method of high purity 4,4'-dihydroxy diphenyl sulfone

摘要

This invention offers the method of producing 4,4 ' - jihidorokishijihuenirusuruhon of quite high purity. Namely, after this invention, phenol and the sulfonation medicine or phenol sulfonic acid dehydrating reacting, the suspension point to jihidorokishijihuenirusuruhon which it forms 4,4 ' in the method of producing - jihidorokishijihuenirusuruhon, under existing of the aromatic type inactive solvent, does the aforementioned dehydration reaction, mixes the polar solvent into the reaction suspensoid which is obtained, making at least the portion of jihidorokishijihuenirusuruhon, 4,4 ' the high purity 4,4 which features that - jihidorokishijihuenirusuruhon is made to crystallize ' it is production method of - jihidorokishijihuenirusuruhon.