What is the production process of bisphenol A?

Comparison of Resin Method and Hydrogen Chloride Method Technologies
(1) Advantages of the resin method process for bisphenol A bpa: ① No need to use expensive corrosion-resistant equipment, and equipment investment is low; ② Less wastewater is generated; ③ The catalyst does not need to be recovered and recycled.
(2) Advantages of the hydrogen chloride method process for bisphenol A bpa: ① The catalyst has high activity, the reaction temperature is low, and few impurities are generated; ② The raw material conversion rate is high; ③ Unreacted acetone does not need to be recycled; ④ The phenol circulation volume into the reactor is the least (the bed is not blocked), and the ortho and para isomers in the reactor do not crystallize; ⑤ No recrystallization is required, reducing investment costs and operating expenses; ⑥ The amount of by-products generated by the reactor is small, and there is no need for a heavy component conversion device.
Aiming at the advantages of catalyst activity and selectivity of the hydrogen chloride method, the ion-exchange resin method has improved the catalyst, and the condensation reaction is carried out at a relatively large phenol-ketone ratio. Phenol is both a reactant and a reaction solvent, which improves the selectivity of the condensation reaction. Impurities in the condensation reaction product can be separated through the crystallization process to obtain high-quality bisphenol A bpa products. In terms of the number of equipment, the resin method is similar to the hydrogen chloride method. At the same time, the ion-exchange resin method process has changed the shortcomings of the hydrogen chloride method process, has weaker corrosion to equipment, and improves the reliability of system operation without increasing investment costs. Therefore, the ion-exchange resin method for producing bisphenol A bpa has become the mainstream technology and development direction.