This invention provides a
bisphenol A anion regeneration
system, comprising an anion
bed. The inlet pipes of the anion
bed are connected to a demineralized water inlet
pipe, a
phenol inlet
pipe, and a caustic soda inlet
pipe. The anion
bed is equipped with a top vent pipe and a bottom vent pipe, and a reverse flow pipe connects the inlet pipe and the bottom vent pipe. The upper inlet of the bottom vent pipe is higher than the upper surface of the anion bed. The advantages of this invention are: it extends the service life of the expensive anion catalyst, and through cyclic regeneration, avoids the huge cost of frequent catalyst replacement. The
phenol solution used in the regeneration process can be recycled, and the waste alkali solution can be centrally treated or partially recovered, further reducing
material consumption and
waste disposal costs. Furthermore, during the regeneration operation, the material is introduced into the
crystallization system through valve switching, avoiding shutdown of the entire production
system, ensuring production continuity, and improving equipment utilization and overall economic efficiency.