Bisfenola

BISPHENOL A
Application: The badger BPA technology is used to produce high-purity bisphenol A (BPA) product suitable for polycarbonate and epoxy resin applications. The product is produced overion-exchange resin from phenol and acetone in a process featuring proprietary purification technology.
Description: Acetone and excess phenol are reacted by condensation in an ion exchangeresin-catalyzed reactor system (1) to produce p,p BPA, water and various byproducts. The crude distillation column (2) removes water and unreacted acetone from the reactor effluent. Acetone and lights are adsorbedinto phenol in the lights adsorber (3) to produce a recycle acetone stream. The bottoms of the crude column is sent to the crystallization feed pre-concentrator (4), which distills phenol andconcentrates BPA to a level suitable for crystallization.
BPA is separated from byproducts in a proprietary solvent crystallization and recovery system (5) to produce the adduct of p,p BPA and phenol. Motherliquor from the purification system is distilled in the solvent recovery column (6) to recover dissolved solvent. The solvent-free mother liquor stream is recycled to the reaction system. A purgefrom the mother liquor is sent to the purge cracking and recovery system (7) along with the process water to recover phenol. The purified adduct is processed in a BPA finishing system (8) to removephenol from product, and the resulting molten BPA is solidified in the prill tower (9) to produce product prills suitable for the merchant BPA market.
Process features: The unique crystallization systemproduces a stable crystal that is efficiently separated from its mother liquor. These plants are extremely reliable and have been engineered to meet the operating standards of the most demandingrefining and chemical companies. The catalyst system uses a unique upflow design that is beneficial to catalyst life and performance. High capacity operation has been fully demonstrated.
Product quality:...