Production manner null of Takasina rank bisphenol

摘要

PURPOSE: To provide a process for evaporating and removing phenol from a bisphenol A.phenol crystalline adduct to obtain a high-purity bisphenol A having excellent hue in high efficiency. ;CONSTITUTION: The objective production process is composed of a phenol evaporation stage to obtain bisphenol A having a phenol content of 1-5wt.% by evaporating a phenol solution containing bisphenol A formed from the crystalline adduct with a thin-film evaporator at 160-185°C under a pressure of 15-60Torr and the 1st and 2nd stripping stages comprising the stripping of the bisphenol A obtained by the phenol evaporation stage by counter-currently contacting the bisphenol A with a stripping gas at 170-185°C under a pressure of ≤15Torr.;COPYRIGHT: (C)1993,JPO&Japio